Biological termEasy1 mark
2(iv)
Read the explanations given below and name the structures:
A structure that collects the soundwaves and conducts them through the external auditory canal.
Topic: Pinna
Previous-year question practice database
Answer
Exam answer
PINNA (ear lobe / auricle).
Explanation
The pinna is the visible flap of the outer ear. Its funnel shape COLLECTS sound waves from the air and directs them into the external auditory canal, which carries them to the eardrum.
It is made of elastic cartilage, which is why it is flexible and springs back when folded.
Follow the path of sound once and several questions answer themselves: pinna → external auditory canal → tympanic membrane → malleus, incus, stapes → oval window → cochlea → organ of Corti → auditory nerve → brain.
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