Pinna and ear canal {outer ear}| gather and focus sound on eardrum.
Only mammal ears have a cartilage flap {pinna}| {pinnae}, to catch sounds.
A 2.5-centimeter tube {auditory canal}| {ear canal}, from outside pinna to inside tympanic membrane, protects tympanic membrane from objects and loud sounds.
Auditory canal has wax {earwax}|. Perhaps, earwax keeps ear canal moist and/or sticks to insects.
Thin connective-tissue membrane {tympanic membrane} {eardrum}| is across ear-canal inner end. Tympanic membrane is 18 times larger than oval window.
1-Consciousness-Sense-Hearing-Anatomy-Ear
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Date Modified: 2022.0225