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प्रश्न
What are the three main parts of the membranous labyrinth.
उत्तर
The bony labyrinth is a membranous structure and is divided into three parts:
- The semicircular ducts
- Two sac like structures - the saccule and the utricle (in the vestibule)
- The cochlear duct (the only part of the ear involved in hearing)
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संबंधित प्रश्न
Which one or more of the expressions in column II are appropriate for the items listed in column I? write the correct matching pairs-
| Column I | Column II |
| (i) The blind spot | (a) colour of the eye |
| (ii) the yellow spot | (b) shape of the lens |
| (iii) Ciliary muscle | (c) protective covering of the brain |
| (iv) Iris | (d) basic unit of brain |
| (v) Meninges | (e) free of rod cells |
| (f) vitreous humour | |
| (g) centre of the retina | |
| (h) no sensory cells |
Tear gland is also called ______.
Arrange and rewrite the terms in the group in the correct order to be in a logical sequence beginning with the term that is underlined:
Fovea, Lens, Cornea, Coniunctiva.
The antiseptic present in tears is ______.
State the functions of the following:
Eyelashes
State the functions of the following:
Tears
Give the reason for the following:
Medicines dropped in the eye flow down into the nose.
Tears have an antiseptic property due to the presence of ______.
Define the following term:
Conjunctiva
Define the following term:
Lysozyme
