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Eye and ear: Photo Gallery
Structure and function of human eye
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Part of the structure
Information
Sclerotic layer
Outer layer of the eye.
Light do not go through it.
2. Cornea
Cornea is a thin and transparent layer which is in front of iris.
3. Choroid layer
Layer inside sclerotic layer.
Help to transport blood to eye.
4. Retina
Inner most layer of the eye.
Contain light sensitive cells.
Also cone cells are located.
5. Aqueous humour
Aqueous humour is a transparent watery liquid.
In between lens and cornea to fill the gap among them.
6. Lens
Biconvex transparent lens which has the ability to change its curvature.
Focus the light rays on retina.
7. Iris
Control the amount of light entering the eye.
8. Pupil
The space in the center of the iris.
And let the light flow through it.
9. Ciliary muscles
Stands to hold the lens.
Help to change the curvature of the lens when necessary.
10. Vitreous humour
A transparent jelly like substance which is in the middle of eye to fill that space and help to maintain the spherical shape of the eye.
11. Fovea /yellow spot
The light sensitive part of the retina.
Sharp imagers form in here.
12. Blind spot
This part do not contain light sensitive cells so even if the light fall on it vision is impossible.
13. Optic nerve
The nerve which transport the massagers from eye to brain
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Eye and ear: Quote
How the curvature of the eye lens change according to the distance of light ray coming from.
Eye and ear: Quote
Eye and ear: Quote
Ear
Structure and functions of human ear
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Parts and information about ear
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Area
Part of the organ and information
Outer ear
Pinna / ear lobe
A cartilaginous organ.
Help sound waves towards the auditory canal.
2. External auditory canal
Bring sound to tympanic membrane.
3. Tympanic membrane
Transposing sound waves into auditory sense.
Middle ear
4. Ossicles
Ossicles are the three bones in the ear named malleus, incuse and stapes.
5. Eustachian tube
An open tube connected to pharynx.
Inner ear
6. Cochlea
Transport auditory sense to auditory nerve.
7. Auditory nerve
Transmit auditory sense to brain.
8. Semi –circular cannel
Maintain the body balance of the body.
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Eye and ear: Quote
Precautions to protect your ear
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Avoid inserting foreign objects into the ear.
refraining exposing to loud noise.
Do not put any medicines for the ear without medical advice.
Avoid diving in deep water without wearing safety equipment.
Eye and ear: Quote
Eye and ear: Quote
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