QQuestion
Write one function each of the following five parts of eyeball of human eye: (a) Cornea, (b) Lens, (c) Retina, (d) Choroid, (e) Iris.
✓Answer
| Parts | Functions |
| (a) Cornea | Refracts light rays entering the eye. |
| (b) Lens | Focuses image on retina by changing curvature. |
| (c) Retina | Contains rods/cones forming inverted image. |
| (d) Choroid | Absorbs stray light, nourishes retina. |
| (e) Iris | Controls pupil size for light entry. |
Related Questions
More WBBSE Easy level questions
Draw a scientific diagram of the vertical section of a human eyeball and label the following parts: [3+2=5] (a) Choroid (b) Lens (c) Cornea (d) Vitreous humour OR Draw a scientific diagram of the anaphase stage of mitotic cell division in an animal cell and label the following parts- [3+2=5] (a) Centromere (b) Daughter chromosome (c) Polar region (d) Spindle fibre
In human body in all _____ pairs of cranial nerves and spinal nerves are present
What is the function of Schwann cell?
Mention one role each of hypothalamus and medulla oblongata in the 24 hours daily life of a person
Write the names of two structural parts of axon.
Blind spot is the part of the eye devoid of light sensitive cells formed at the junction of optic nerve and retina.
Accommodation is the ability of the retina of the eye to adjust the focal length as needed.
Write two differences between axon and dendron.
Cornea, Choroid, Lens, Aqueous humour, Iris, Vitreous humour — how many of these are refractory media of the eyeball? (a) 3 (b) 4 (c) 5 (d) 6
Which of the following is not a structural feature of an Axon? (a) Node of Ranvier (b) Myelin sheath (c) Nissl granule (d) Schwann cell
Name any two structural parts of Neurone
Explain the causes of Myopia and Hyperopia