Given below is the transverse section of the human ear. Read the information below the diagram and fill in the blanks:
The sense organs enable us to be aware of the conditions of our external and internal environment. The human ear is concerned with two functions, hearing and body balance.
The outer ear consists of the projecting part (a) ............... (pinna, pharynx) and the passage auditory canal leading to the (b) ............... (thrombus, tympanum). The middle ear contains three bones and a (c) ............... (eustachian tube, effector) which connects the cavity of the middle ear with the throat. The three bones are collectively called the (d) ............... (organelles, ossicles). The inner ear has three parts. One of them is spiral-shaped and looks like a snail shell which is called the (e) ............... (cochlea, canine).
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The outer ear consists of the projecting part (a) pinna and the passage auditory canal leading to the (b) tympanum. The middle ear contains three bones and a (c) eustachian tube which connects the cavity of the middle ear with the throat. The three bones are collectively called the (d) ossicles. The inner ear has three parts. One of them is spiral-shaped and looks like a snail shell which is called the (e) cochlea.