Biology
The figure given below shows the principal parts of a human ear. Study the diagram and answer the following questions.
(a) Label the parts 1 to 8.
(b) State the role of parts 6, 7 and 8.
(c) Why is it harmful to use a sharp object to remove ear wax? Mention the number and name of the part involved.
Sense Organs
171 Likes
Answer
(a) The labelled parts are:
- 1 → External ear (pinna)
- 2 → Ear drum (tympanum)
- 3 → Auditory canal
- 4 → Malleus
- 5 → Semicircular canals
- 6 → Cochlea
- 7 → Auditory nerve
- 8 → Eustachian tube
(b) Part 6 (Cochlea) — It contains sensory cells for hearing.
Part 7 (Auditory nerve) — It transmits impulse of hearing to the brain.
Part 8 (Eustachian tube) — It equalizes air pressure on both the sides of the tympanum.
(c) It is harmful to use a sharp object to remove ear wax as it can rupture the ear drum.
The part involved is part 2 — Ear drum (tympanum).
Answered By
117 Likes
Related Questions
Given below is a diagram of a part of the human ear. Study the same and answer the questions that follow:
(i) Give the collective biological term for Malleus, Incus and Stapes.
(ii) Name the parts labelled A, B and C in the diagram.
(iii) State the functions of the parts labelled 'A' and 'B'.
(iv) Name the audio receptor region present in the part labelled 'A'.
Have a look at the posture of this girl who is reading a book and answer the questions which follow:
(a) Name the problem she is facing.
(b) What are the two conditions shown in sections A and B of the eye as applicable to her?
(c) What kind of reading glasses does she need ?
Given below is the internal structure of the human ear. Match the structures marked (a) to (e) with their correct function.
Aman's father, aged 50 years, is suffering from an eye defect. He can see the distant objects clearly but not the nearby ones. He keeps the newspaper and books far away from his eyes to read. Answer the following questions :
(a) Identify the eye defect.
(b) Mention the possible reason for this defect.
(c) What kind of lens can be used to correct this defect?
(d) Name the structure in the human eye which holds the lens in proper position and attaches it to the ciliary body.