July 24, 2020 • 13 mins
In this episode, Miss Irene Treats the topic Sense Organ, The Organ Of Sights on the subject of Biology.
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Episode Transcript
Available transcripts are automatically generated. Complete accuracy is not guaranteed.
(00:08):
Welcome to another educative edition of thepodcast for Education exclusive liberal to you by
Africa Business Radio. My name isHonoga. Now taking the subject biology is
Miss Iron and she'll be treating thetopic Sinse Organ, Organ of sight.
And this is for the SS threestudents. Hello learners, welcome to another
(00:35):
fun time of learning. My nameis Miss Irene. We are going to
be learning about Saints Organ, theorgan of sights in biology for SS three.
We are going to be learning aboutSains Organ, Organ of sights in
biology for SS three. The SainseOrgan has to do with how the body
receives information from its environment. TheSainse Organ has to do with how the
(01:00):
body receives information from its environment.And one thing I want us to quickly
remind ourselves of is Missus Green.I want us to remind ourselves of Missus
Green. You know we have Mis for movement, our is for respiration.
S it's for sensitivity. We aregoing to be focusing on that s
(01:22):
part, sensitivities sense. You knowhow we receive information from our environment.
They are different ways we receive information. I know we are big boys and
girls in s S three right now, and sometimes you're like oh, what
are some of the sense organ SoI want you to quickly recap some of
the sense organs that you have inyour body. So if you've been able
(01:46):
to so mention them, all right, very good. So we have the
I the organ of sight, right, we have the tongue to taste,
we have the skin to feel,we have the ear to ear right,
okay, very good, very good, and we have the nose to smell.
(02:07):
All these are the different sense Again, if you're able to name them
correctly and remember their function, thatis fantastic. That is fantastic. Well
done. Now, information about mechanical, tamal, chemical, and electromagnetic changes
in the internal and external environment areperceived by sensory receptors in our bodies.
(02:30):
These process the information and make usaware of changes. There are four main
groups of sensory receptors. Namely,we have the mechano receptor. This the
tech mechanical stimulize such as sound,gravity, pressure, vibration, and etc.
Then we have the tamral receptors.These de tech TAML stimulis such as
(02:53):
eat and code. We have thechemera receptor This the tech chemical stimulize such
as odor and taste. Then wehave the faulty receptors. These detect electromagnetic
visual stimuli such as light intensities andcolor. The sensory receptors transform the stimuli
(03:14):
received into a nerve impulse which istransmitted to the central nerve system for interpretation
and appropriate response. Now forms ofsensory receptors, they are different types of
sensory receptors. We have the primarysense cells. These exist as free nerve
(03:36):
endings of nerve fiber eg. Thetouch receptor in the mammalian skin. Then
we have the secondary sense cells.These consists of group of cells that are
not neuron They are specialized to detectstimuli. And these secondary sense cells are
congregated in the sense organ. Theseare gated in the sense organ. Today
(04:02):
we are looking at the sense ofsight. We are looking at the sense
of sight. The organ that isprimarily responsible for the sense of sight is
what is known as the eye.Is what is known as the eye.
And then that means that we aregoing to be looking extensively at the eye.
We're going to be looking extensively atthe eye, will be discussing about
(04:25):
it's anatomy and its physiology. It'sanatomy and its physiology and which Right now,
you're in my biology lab and youcan see a sample of the model
of the anatomy of the eye.So we are going to be looking at
it, and we are going tobe discussing about the different parts and looking
at the different physiology and what theydo. Briefly, now, the human
(04:49):
eye, the part that is easilyseen by the outside world is the eye
lad. We have the eyelid,and then we have the very we are
the pupil or the eyeball that isseen by the human eye, that is
seen in everybody. When you lookinto your friend's face, what you see,
you're looking at the eyeball. Now, the eyeball is composed of different
(05:14):
organs. Okay, it's composed ofdifferent parts that make up the sense organs.
Now we have the first part.We have the cornya. We have
the very first parts. We havethe cornya. Now the cornya from the
cornea, we have the pupil.The pupil is the colored part of the
eye. The pupil is like theopen aperture of the eye. Just in
(05:35):
front of the pupil, between thecornea and the pupil, we have what
is known as the acres. Humoris a liquid that are filled up between
the cornea and the pupil. Thenwe have the iris. Okay, we
have the iris. From there wehave what is called the conjunctiva, and
then we have the celery muzzles.We have the lens that is found after
(06:00):
the pupil. Then we have thesuspensory ligament. The suspensory ligament attaches the
eyeball to the skull. These attacksthe eyeball to the skull. And then
we have the virtuous humor, whichis the liquid that fills the cavity of
the eye. Then we also havethe optic nerve. This is the nerve
(06:23):
that connects and sends information from theeye as a sense organ to the brain.
Then from there we have the layer. We have the different layer which
is the sclearer, and then wehave the choroid layer. These are different
layers of the eye. Then wehave nerves points on the retina. We
have nerve points on the retina.One of them is called the fhobia,
(06:47):
and we have what are usually calledthe cones and the rods that are found
on the retina. And we havethe fhobia. We have the merculia and
we have the papilia. All theseare the different organelles found on the eye
as an organ From here we arealso going to look at the anatomy of
the eye. The eyeball has threeparts. It has the inner retina okay.
(07:12):
It has the inner retina which containphoto receptors okay. And then we
have the middle uvia, which isthe choroid, the celia and the iris.
We have the choroid, the cillarybody and the iris. And then
we have the outer sclara Okay.We have the outer sclearra, which includes
(07:33):
the transparent cornea. The eyeball containtwo cavities, the interior cavity and the
posterior cavity. The small anterior cavityis in front of the lens and it's
further divided by the iris into theanterior chamber filled with the acres humor,
(07:54):
and then a posterior chamber filled withthe virtuous humor. Behind the lens is
the larger posterior cavity, which containthe virtures. Okay, we contain the
vitures. Now the lens is behindthe eye ris held in place by the
cillary body. Okay. The lensis held in place by the cillary body
(08:16):
and then the suspensory ligament called zonos. The visible portion of the sclera is
covered by the conjunctiva and it hassix muzzles that owes it together and help
moves the eyeball. The six muzzlesare what are called the superior inferior media
lateral rectors muzzles and then the superiorand the inferior uplique muzzles. All these
(08:41):
are the different muzzles that help movethe eyeball. Then the nerves supply the
eye is supplied by the optic nerve, which contain fibers from the retina.
Now you could almost hear that theretina is coming up severally. The retina
is a major part of the eye, is the most sensitive part of the
eye and is a part of theeye that receives information from the external environment.
(09:09):
The light information from the external environment. The eye muscles are supplied by
the oculo motor and the choc layerand the abducens. Okay, all these
are different nerves that supplies the retina, and the lead muscles are supplied by
the facial nerve to the different occulomotor nerves. Now, all these are
(09:33):
all medical terms. That helps theeye to function and makes us to be
able to see. Now, oneof the very important things I need us
to understand is that the rods andthe cones that are found on the retina,
they are the sensitive portion that thelights from the external environment that traps
information and help transmit the information tothe optic nerve that sends information to the
(09:58):
brain that tells us what image weare seeing. Now, what we have
is that light entering the eye passesthrough the cornya, then through the pupil
and untrue to the crystal line lens, and then the virtuals to the retina,
the cornea, the aircres imo,the lens and are refracting media of
(10:20):
the eye. They are all refractingmedia, and the change in the curvature
of the lens are brought about bythe elasticity and by the contraction of the
cillary muzzles. Now we have thatthe cillary muzzle help control the lens or
the coverture of the lens. Andthis is responsible because most of the time
when light enters the eyes, sometimesthe light is a bit much for the
(10:45):
eye, so the cillary muzzles contractto reduce the width of the length of
the length of the lens. Butwhen it is little light, it increases
the length to increase the amount oflight that the eyes received. And all
these different changes are what enables usto see. And these changes focus light
(11:07):
ray on the retina, the virtualarea of the cerebral cortest located in the
hospital register the visual sensation. Now, the amount of light entering the eye
is regulated by the iris. Theeye ris are the openings, okay,
it's the amount of light is regulatedby the iris. It constricts and dilates
(11:28):
based on the changes and the sizeand the muzzles and then the size of
the pupil in response to the varyingamount of light. This controls the amount
of light that the eye receives.All these different cells and this different organ
the work in hammonate to help usbe able to see an object and to
(11:50):
identify colors, to identify shapes,to identify depths, and to identify the
varying degrees of things that we see. All these are the different part of
the eye that help us to see. Now, I want you to carry
out an experiment for you to observethe opening and closing of the iris.
(12:13):
I want you to look into themirror with the light on in your room.
Try to see if you can seethe way the thighs of the Irish
shrinks or expands. And then switchon the light and see how the circles
of the Irish enlarges. When youswitch off the light, the Irish will
(12:33):
shrink, it will reduce, theapperture will reduce, and when you switch
on the light, the apperture wheelincrease. That mean the circle will become
bigger when the light is off andthe circle will become smaller when the light
is off. So this is allwe'll be learning about today until we meet
again for further exciting experiences of learning. Do have a wonderful time. Thank
(13:05):
you for listening to this episode ofthe Podcast for Education. For your feedbacks
and comments, Remember you can hitus up across any of our social media
handles that is on Facebook, Instagramat Africa Business Radio Twitter at Africa Business
Radio. Also to remember that youcan listen to this particular episode or any
of the Podcast for Education episode onour podcast channel log on to www dot
(13:28):
Africa Business Radio dot com to doso. I am on NJA saying do
not stop learning. Bye for now
Welcome to another educative edition of thepodcast for Education exclusive liberal to you by
Africa Business Radio. My name isHonoga. Now taking the subject biology is
Miss Iron and she'll be treating thetopic Sinse Organ, Organ of sight.
And this is for the SS threestudents. Hello learners, welcome to another
(00:35):
fun time of learning. My nameis Miss Irene. We are going to
be learning about Saints Organ, theorgan of sights in biology for SS three.
We are going to be learning aboutSains Organ, Organ of sights in
biology for SS three. The SainseOrgan has to do with how the body
receives information from its environment. TheSainse Organ has to do with how the
(01:00):
body receives information from its environment.And one thing I want us to quickly
remind ourselves of is Missus Green.I want us to remind ourselves of Missus
Green. You know we have Mis for movement, our is for respiration.
S it's for sensitivity. We aregoing to be focusing on that s
(01:22):
part, sensitivities sense. You knowhow we receive information from our environment.
They are different ways we receive information. I know we are big boys and
girls in s S three right now, and sometimes you're like oh, what
are some of the sense organ SoI want you to quickly recap some of
the sense organs that you have inyour body. So if you've been able
(01:46):
to so mention them, all right, very good. So we have the
I the organ of sight, right, we have the tongue to taste,
we have the skin to feel,we have the ear to ear right,
okay, very good, very good, and we have the nose to smell.
(02:07):
All these are the different sense Again, if you're able to name them
correctly and remember their function, thatis fantastic. That is fantastic. Well
done. Now, information about mechanical, tamal, chemical, and electromagnetic changes
in the internal and external environment areperceived by sensory receptors in our bodies.
(02:30):
These process the information and make usaware of changes. There are four main
groups of sensory receptors. Namely,we have the mechano receptor. This the
tech mechanical stimulize such as sound,gravity, pressure, vibration, and etc.
Then we have the tamral receptors.These de tech TAML stimulis such as
(02:53):
eat and code. We have thechemera receptor This the tech chemical stimulize such
as odor and taste. Then wehave the faulty receptors. These detect electromagnetic
visual stimuli such as light intensities andcolor. The sensory receptors transform the stimuli
(03:14):
received into a nerve impulse which istransmitted to the central nerve system for interpretation
and appropriate response. Now forms ofsensory receptors, they are different types of
sensory receptors. We have the primarysense cells. These exist as free nerve
(03:36):
endings of nerve fiber eg. Thetouch receptor in the mammalian skin. Then
we have the secondary sense cells.These consists of group of cells that are
not neuron They are specialized to detectstimuli. And these secondary sense cells are
congregated in the sense organ. Theseare gated in the sense organ. Today
(04:02):
we are looking at the sense ofsight. We are looking at the sense
of sight. The organ that isprimarily responsible for the sense of sight is
what is known as the eye.Is what is known as the eye.
And then that means that we aregoing to be looking extensively at the eye.
We're going to be looking extensively atthe eye, will be discussing about
(04:25):
it's anatomy and its physiology. It'sanatomy and its physiology and which Right now,
you're in my biology lab and youcan see a sample of the model
of the anatomy of the eye.So we are going to be looking at
it, and we are going tobe discussing about the different parts and looking
at the different physiology and what theydo. Briefly, now, the human
(04:49):
eye, the part that is easilyseen by the outside world is the eye
lad. We have the eyelid,and then we have the very we are
the pupil or the eyeball that isseen by the human eye, that is
seen in everybody. When you lookinto your friend's face, what you see,
you're looking at the eyeball. Now, the eyeball is composed of different
(05:14):
organs. Okay, it's composed ofdifferent parts that make up the sense organs.
Now we have the first part.We have the cornya. We have
the very first parts. We havethe cornya. Now the cornya from the
cornea, we have the pupil.The pupil is the colored part of the
eye. The pupil is like theopen aperture of the eye. Just in
(05:35):
front of the pupil, between thecornea and the pupil, we have what
is known as the acres. Humoris a liquid that are filled up between
the cornea and the pupil. Thenwe have the iris. Okay, we
have the iris. From there wehave what is called the conjunctiva, and
then we have the celery muzzles.We have the lens that is found after
(06:00):
the pupil. Then we have thesuspensory ligament. The suspensory ligament attaches the
eyeball to the skull. These attacksthe eyeball to the skull. And then
we have the virtuous humor, whichis the liquid that fills the cavity of
the eye. Then we also havethe optic nerve. This is the nerve
(06:23):
that connects and sends information from theeye as a sense organ to the brain.
Then from there we have the layer. We have the different layer which
is the sclearer, and then wehave the choroid layer. These are different
layers of the eye. Then wehave nerves points on the retina. We
have nerve points on the retina.One of them is called the fhobia,
(06:47):
and we have what are usually calledthe cones and the rods that are found
on the retina. And we havethe fhobia. We have the merculia and
we have the papilia. All theseare the different organelles found on the eye
as an organ From here we arealso going to look at the anatomy of
the eye. The eyeball has threeparts. It has the inner retina okay.
(07:12):
It has the inner retina which containphoto receptors okay. And then we
have the middle uvia, which isthe choroid, the celia and the iris.
We have the choroid, the cillarybody and the iris. And then
we have the outer sclara Okay.We have the outer sclearra, which includes
(07:33):
the transparent cornea. The eyeball containtwo cavities, the interior cavity and the
posterior cavity. The small anterior cavityis in front of the lens and it's
further divided by the iris into theanterior chamber filled with the acres humor,
(07:54):
and then a posterior chamber filled withthe virtuous humor. Behind the lens is
the larger posterior cavity, which containthe virtures. Okay, we contain the
vitures. Now the lens is behindthe eye ris held in place by the
cillary body. Okay. The lensis held in place by the cillary body
(08:16):
and then the suspensory ligament called zonos. The visible portion of the sclera is
covered by the conjunctiva and it hassix muzzles that owes it together and help
moves the eyeball. The six muzzlesare what are called the superior inferior media
lateral rectors muzzles and then the superiorand the inferior uplique muzzles. All these
(08:41):
are the different muzzles that help movethe eyeball. Then the nerves supply the
eye is supplied by the optic nerve, which contain fibers from the retina.
Now you could almost hear that theretina is coming up severally. The retina
is a major part of the eye, is the most sensitive part of the
eye and is a part of theeye that receives information from the external environment.
(09:09):
The light information from the external environment. The eye muscles are supplied by
the oculo motor and the choc layerand the abducens. Okay, all these
are different nerves that supplies the retina, and the lead muscles are supplied by
the facial nerve to the different occulomotor nerves. Now, all these are
(09:33):
all medical terms. That helps theeye to function and makes us to be
able to see. Now, oneof the very important things I need us
to understand is that the rods andthe cones that are found on the retina,
they are the sensitive portion that thelights from the external environment that traps
information and help transmit the information tothe optic nerve that sends information to the
(09:58):
brain that tells us what image weare seeing. Now, what we have
is that light entering the eye passesthrough the cornya, then through the pupil
and untrue to the crystal line lens, and then the virtuals to the retina,
the cornea, the aircres imo,the lens and are refracting media of
(10:20):
the eye. They are all refractingmedia, and the change in the curvature
of the lens are brought about bythe elasticity and by the contraction of the
cillary muzzles. Now we have thatthe cillary muzzle help control the lens or
the coverture of the lens. Andthis is responsible because most of the time
when light enters the eyes, sometimesthe light is a bit much for the
(10:45):
eye, so the cillary muzzles contractto reduce the width of the length of
the length of the lens. Butwhen it is little light, it increases
the length to increase the amount oflight that the eyes received. And all
these different changes are what enables usto see. And these changes focus light
(11:07):
ray on the retina, the virtualarea of the cerebral cortest located in the
hospital register the visual sensation. Now, the amount of light entering the eye
is regulated by the iris. Theeye ris are the openings, okay,
it's the amount of light is regulatedby the iris. It constricts and dilates
(11:28):
based on the changes and the sizeand the muzzles and then the size of
the pupil in response to the varyingamount of light. This controls the amount
of light that the eye receives.All these different cells and this different organ
the work in hammonate to help usbe able to see an object and to
(11:50):
identify colors, to identify shapes,to identify depths, and to identify the
varying degrees of things that we see. All these are the different part of
the eye that help us to see. Now, I want you to carry
out an experiment for you to observethe opening and closing of the iris.
(12:13):
I want you to look into themirror with the light on in your room.
Try to see if you can seethe way the thighs of the Irish
shrinks or expands. And then switchon the light and see how the circles
of the Irish enlarges. When youswitch off the light, the Irish will
(12:33):
shrink, it will reduce, theapperture will reduce, and when you switch
on the light, the apperture wheelincrease. That mean the circle will become
bigger when the light is off andthe circle will become smaller when the light
is off. So this is allwe'll be learning about today until we meet
again for further exciting experiences of learning. Do have a wonderful time. Thank
(13:05):
you for listening to this episode ofthe Podcast for Education. For your feedbacks
and comments, Remember you can hitus up across any of our social media
handles that is on Facebook, Instagramat Africa Business Radio Twitter at Africa Business
Radio. Also to remember that youcan listen to this particular episode or any
of the Podcast for Education episode onour podcast channel log on to www dot
(13:28):
Africa Business Radio dot com to doso. I am on NJA saying do
not stop learning. Bye for now
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