Biology
Categorise the following parts under
(i) external (ii) middle (iii) internal ear.
Ear drum, hammer, pinna, cochlea, anvil, stirrup, eustachian tube, tympanum, oval window, semi-circular canals.
Sense Organs
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Answer
- External Ear — Ear drum, pinna, tympanum
- Middle Ear — Hammer, Anvil, stirrup, Eustachian tube, oval window
- Internal Ear — Cochlea, semi-circular canals
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Related Questions
Name the following :
(i) Place of best vision in the retina of the eye
(ii) Place of no vision in the retina of the eye
(iii) Kind of retinal cells sensitive to dim light
(iv) The circular opening enclosed by iris
(v) The fibres which collectively hold the lens in position
(vi) Capacity of the eye to focus at different distances
(vii) The kind of lens required to correct near sightedness
(viii) The layer of the wall of the eye-ball that corresponds to the black lining of the box of a camera
Give the reason for the following:
(i) Medicines dropped in the eye flow down into the nose.
(ii) A person from bright sunlight outside enters a poorly lit room and feels blinded for a short while.
State the functions of the following :-
(i) Semi-circular canals
(ii) Cochlea
(iii) Auditory nerve
Mention if the following statements are true (T) or false (F) :
(i) Human ear is concerned with hearing only.
(iii) Pinna concentrates and directs sound waves towards tympanum.