Given below is the diagram of the human ear. Study the same and answer

1.	Given below is the diagram of the human ear. Study the same and answer the questions that follow :(i) Give the biological term for the part labelled ‘A’ and state its function. (ii) Name the part labelled ‘B’ and state its function. (iii) Name the part labelled ‘C’ and state its function. (iv) Give the function of ear wax.
Answer» (i) Part labelled ‘A’ is called as ear ossicles. It is made up of three bones malleus, incus and stapes. These ear ossicles transmit the sound waves from external to the internal ear. (ii) Part labelled ‘B’ is called as eustachian tube. It acts as ventilator to equalize pressure of air on both the sides of tympanic membrane that forms the outer boundary of middle ear. (iii) Part labelled ‘C’ is auditory nerve (vestibular and cochlear nerve) which carries hearing impulses to the brain. (iv) Ear wax lubricates the tympanum for proper functioning.

Given below is the diagram of the human ear. Study the same and answer the questions that follow :(i) Give the biological term for the part labelled ‘A’ and state its function. (ii) Name the part labelled ‘B’ and state its function. (iii) Name the part labelled ‘C’ and state its function. (iv) Give the function of ear wax.

Answer»

(i) Part labelled ‘A’ is called as ear ossicles. It is made up of three bones malleus, incus and stapes. These ear ossicles transmit the sound waves from external to the internal ear.

(ii) Part labelled ‘B’ is called as eustachian tube. It acts as ventilator to equalize pressure of air on both the sides of tympanic membrane that forms the outer boundary of middle ear.

(iii) Part labelled ‘C’ is auditory nerve (vestibular and cochlear nerve) which carries hearing impulses to the brain.

(iv) Ear wax lubricates the tympanum for proper functioning.

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