Biology
WAEC 2024
The diagram above is an illustration of sense organ in humans. Study it and answer questions 15 and 16.
The part that protects the organ is labelled
Correct Answer: Option B
Explanation
The parts labelled are:
I - IRIS
II - EYE LASHES
III - PUPIL
IV - SCLERA
The sclera, cornea, eyelids, eyelashes, and bony orbit all protect the eye from injury.
Sclera - labelled IV
- The tough, white, fibrous tissue that surrounds the eyeball
- Helps maintain the eye's shape
- Protects the eye from injury
- Extends from the cornea to the optic nerve at the back of the eye
Cornea
- The clear, curved layer in front of the iris and pupil
- Protects the front of the eye
- Helps focus light on the retina at the back of the eye
Eyelids
- Thin flaps of skin and muscle that can cover the eye
- Reflexively close quickly (blink) to protect the eye from foreign objects, wind, dust, insects, and very bright light
Eyelashes - labelled II
- Short, tough hairs that grow from the edge of the eyelid
- Keep insects and foreign particles away from the eye
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