GCSE Biology - How the Eye Works (Part 1) - Structure of the Eye & Iris Reflex #31
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- Опубліковано 2 жов 2024
- This video covers
- The structure (anatomy) of the eye
- How the iris reflex works and allows us to respond to changes in light intensity
Exam board specific info:
AQA - Only triple/separate science
IGCSE Edexcel - Appropriate for all courses
Edexcel - Only triple/separate science
OCR 21st Century - Only triple/separate science
OCR Gateway - Only triple/separate science. Also don't need to know the iris reflex in response to light intensity, so only the first part about structure
GCSE Chemistry playlist:
• GCSE Chemistry - Atoms...
GCSE Biology Playlist:
• Video
GCSE Physics Playlist:
• Video
whos revising for paper 2 tomorrow? 😒
me amigo
@@velocityyy1244 get me out of here
Meee 😢😢😢
Me but its a mock lol
You are the best channel for GCSE and IGCSE Sciences and Math.
I cannot type out enough words to describe how useful your content has been. God bless your soul. You are an angel
Thank you so much 😊
Yo, whos here for there biology lesson
Aren't we supposed to?
I don't know if anyone fell for that 😂😂 but @Oscar Moises and @Augustine Pablo are duo scammer. I've seen them in other places too XD
im 1 yyea r late but i have a presentation about this tomorrow 😢
@@dania-c1y good work
i don't understand what my teachers explain in school so i rely on u but u never let em down thx
You explain it so much easier omg I wish I wrote notes from you
Who’s watching day before biology gcse
please become my teacher i am understanding my syllabus because of you
you don't know how much i am grateful for this continue making this kind of amazing videos!!
Thanks Khushi, we're glad you're finding them helpful 😊
Hey, this is awesome! I found this really helpful for my biology revision for my test next week. My teacher reccommended you to my class. Short, sweet and quick
Thanks Gaia, glad it was helpful 😊
Yea Short,Sweet,Quick
you give hand in revising my portions for my exams in a sweet,short and in a crisp way. love all ur videos. love from India❤❤❤
Perfect, glad we could help you out Abirami 👍
This video was really helpful! It got me thinking about treating colour-blindness:
could scientists treat it by inserting cone cells into the (colour-blind) patient’s eye?
I don't think so. I have a friend who is colour blind, they can see certain colours, but not all.
it’s probably more of an inability to see certain wavelengths (?) -> since colours are made up of wavelengths on the electromagnetic spectrum
WOW!! I can't wait for part 2 because this is really useful!
Thanks Kuba! Not long now 🙌
I'm two years late but this really does sound like you were held at gunpoint
@@avymar7167 PLS-
shush
@@umarrana4857 u having a test
Hi triple science class 👀
Thank you so much for this wonderful video, it was very helpful! Why I cannot even believe how much I just learned from you in just under 5 minutes 😃😂😁
If you’d like to practise what's covered in this video, check out the lesson on the Cognito platform - cognitoedu.org/coursesubtopic/b2-gcse-aqa-h-t_4.13. The platform’s totally free, and has been built to make learning and revision as easy as possible. The main features are:
- Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown.
- Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on.
- Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like.
- A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts.
- A comprehensive bank of past exam papers, organised both by year, and also by topic.
Amadeus & Tom
Tysm this rlly helped for revision
I have a question- when you need to see objects at a distance, what happens to the lens??
Y’all who’s here preparing for their igs
I thought you were doing physics so are you going back to biology or is this higher than gcse
Hey, we’re now releasing alternating videos for each subject as we’ve done the bulk of each one. The videos coming out now are mostly the triple science material for each subject 🙌
Got my bio exam tomorrow and i am so cooked, what a fod subject!
Bro same 💀
gl for tomorrow asw if u take triple, lucky the eye wasn't in paper 1 (for igcse)
Would u mind doing a video on Aerobic Respiration?
thankyou so much for this video! really well explained! it makes so much more sense now !
Great to hear - thanks Gary!
What exam board is this for?
You didn't talk about circally muscle and sercally legament
i love yall so much, thank you
It says about the pupil reflex in the syllabus.... Is the iris relfex and the pupil reflex the same thing?
when you are going to put more videos
!!!!!!!!!!!! i need videos for 11 grade please without you i whould not pass
i really love you
Thank you! :D
really helping have got my biology exam this morning!
Could you please make a video on coordination?
I see. How very intereyesting
In this playlist for GSCE biology what content do you miss out on? Because it mentions that you covered the majority of content. Thank you so much.
dim light - pupil dilate- radial muscles contract- circular muscles relax
bright light - pupil constrict - circular muscles contract- radial muscles relax
❤high majesty ,accept my poor opinion to the eye,the is united to the brain and heart. Sense of feeling and taste and touch or etc.the is a magic sense,many hide on this? Even they pick up to the camera or to the cctv camera or etc. To erase it and gone! the@ EYE@
Since they cornea absorbs oxygen only by diffusion directly from the air, then if a person sleeps and closes his/her eyelid, the cells in the cornea wouldn't respire any way right? And consider if a person sleeps for a long time, say 10 hours. Does that have an effect on the cells of the cornea and its job in the eye?
i dont think thats how it works. humans dont absorb oxygen from diffusion lmao, its from breathing
@@ss-hc7tb Look it up. I believe that the cornea is the only tissue that gets oxygen directly from air. If blood were to flow through it, the cornea would be red since blood itself isn't transparent, and the red veins in the eye when having tiresome eyes seems very obvious and clear the eye is redish that time.
when in bright light, the pupil constricts to reduce light entering the eye this can be done when the radial muscles relax and the circular muscles contract
when in dim light, the pupil dilates to allow more light to enter the eye, this can be done when the circular muscles relax and the radial muscles contract
thank u
GCSE today thanks cognitio
your videos have been very useful to me thank you very much and plus they are free,first time i heard about them it seemed like i had to pay to view them but nope🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥
Wow the way you taught this concept was so much better yhen my teacher 😊if you were my teacher i would be trully blessed
Fact to impress your examiner: the point on the retina that the light focuses on is called the fovea (centralis)
❤my eye seen something too seen even to the dark sign up the heaven above,why?stoney is a one eye,one heart.
Does damaging the cornea damages my eye sight?
Yes pritty much
Can this be downloaded and used for other students
Trying to remember which muscles contract and which muscles relax is so confusing
it's always the opposite when u think it contracts it relaxes and when u think it relaxes it contracts just like biceps and triceps. :)
@@suvarnikaradhakrishnan1247 that’s what I was thinking
Great video! Really helpful for my biology test! Thanks!
My friend u are the GOAT of IGCSE science
Thanks my image i had to study overwhelmed me
Thanks for you teaching, you've made it simpler for me than my teacher👏👏
im the 135th comment!!!
Got biology tomorrow wish me luvk
I ABSOLUTELY LOVE YOUR VIDEOS AND YOUR WEBSITE
What exam board do you teach
Have a great day everyone!
ok nice comment but what does this have to do with the vedio its self
Same to you🥺😌
Bro u are sigma because u help me with ma homework, you are a true ohian rizzler, Keep it up!
U teached better than teacher.
Thanks
How interesting…..
this was insanely helpful, thanks!!
anyone playing this just so your teacher doesn't think you're listening to music
not rlly , but i think imma snitch about u to the teacher for doing that : )
Only u😊
Doing it rn💀
Lol me 2
hi guys
u might know me
lolz
Very useful page i am impressed very very very Nice Best Of Luck and Thank You for these intense and useful information not less than a Good and inspiring lecture.
did anyone else's eyes feel weird watching this? XD
👎🏻
Really good explanation!!! Just subbed to your channel!
I will let you know how I did on my test
I think I did pretty good but I don't think I'm getting my results cause schools are closed for the 3rd time due to covid
Please make a video on support movement and locomotion
Video was helpful... please create more videos🤩
U are an absolute life saver thank u so much!
what is the function of the retina
I think it helps you focus when the light retracts and hits it.
It’s the light-sensitive lining of the eye: it’s part of the nervous system. Pain nerves sense pain, temperature nerves sense hot and cold, and retinal photoreceptors sense light and send it to the visual part of the brain to produce the experience we call sight
This is Indian and you
🤣 I think they mean "I am Indian, what about you?"
Hold up what did he sayyyyyyyyyyyyyyyyyyyyyy?????//
Education is not eazzzzzzy
Commented
thank you
The structure of the eye was not explained properly. The part explaining iris reflex was clear and well explained.
Hi there, would you mind elaborating on which part of the structure wasn't explained properly (so that we can fix it)?
@@Cognitoedu Often questions are asked about the structure and function of the three layers of eye - sclera, choroid and retina. This part was not explained properly. May be a separate video explaining the different layers and parts of the eye is required.
Thank you @@rangineechoudhury3755 Can I ask which exam board it is you do?
@@Cognitoedu IGCSE
IGCSE Edexcel or IGCSE Cambridge (CIE) is that sorry?
4:00 very well explained sir
❤❤❤❤
i have a phobia of too mny eyes! The pictue at the start is too much!!
Womp womp
algorithm
Pls sum things up at the end of your videos.
Thank you.
It really helped me thanks ❤️❤️
my teacher gave me this 0-0
teacher: tells me to watch the vedio
me: dislikes the vedio
me:😈
vedio ----> video
no beef just tryna help lmao :p