Biology Mind map for end of yer exam year 10
- Created by: Ted Turner
- Created on: 17-05-18 19:04
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- The Eye
- Parts of the eye
- Iris
- contain muscle sthat allow it to control the diameter of the pupil.
- Cornea
- It is the outer layer found at eth front of the eye. it refracts light into the eye
- Pupil
- controls how much light gets into the eye
- Lens
- this focuses the light onto the retina.
- Ciliary muscle
- controls the shape of the eye
- Scelra
- this is the tough layer found at the front of the eye
- Optic nerve
- carries impulses from the receptors on the retina to the brain
- Retina
- this contains the receptor cells sensitive to light intensity and colour
- Suspensory ligaments
- controls the shape of the eye
- Iris
- shape of the eye in different types of light
- In low light the radial muscles contract and the circular muscles relax, which makes the pupil wider.
- when the light is bright the light receptor in the eye detect the bright light, a relax in the radial muscles happens and the circular muscles contract. this makes the eye smaller and allows less light into the eye
- focusing on near and distant objects
- near object
- the ciliary muscles contract which slackens the suspensory ligaments
- The lens becomes more fat (more curved).
- This increases the amount by which it refracts light.
- Far object
- the ciliary muscles ,which allows the suspensory ligaments to pull tight
- this makes the lens go thin (less curved)
- Untitled
- near object
- Parts of the eye
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