The middle ear is filled with nitrogen-rich gas. The middle ear has no regular shape and varies from individual to individual. The ceruminous glands produce a moist white secretion that becomes sticky, dark, and thick when dried The sebaceous glands secrete sebum which is an oily substance into the hair follicles of the auditory canal. These glands are a group of ceruminous and sebaceous glands.
#FUNCTIONAL ANATOMY OF THE EAR PRACTICE QUESTIONS SKIN#
The inner layer is lined with a thin layer of skin which holds wax-producing glands. External auditory canal – This external auditory canal is cylindrical in structure protected by bones and cartilages.Pinna consists of the helix, antihelix cartridge, tragus, earlobes, concha, triangular fossa, anterior notch and antitragus A protruded ear is developed with lobule and triangular fossa.
A curved cartridge is developed parallel to the helix or outer rim of the ear. Hair follicles are present in the thin lining of cartilage. Pinna : The external ear is composed of cartilage.Outer ear: It consists of ear pinna and external auditory canal.The three parts of the human ear differ in their structural details: The human ear is divided into three major parts: The inner ear acts by converting the sound waves to messages and sends the message to the brain cells. The middle ear performs the same function as the outer ear but at a granular level and maintains air pressure with the help of an eustachian tube. The outer ear is responsible for collecting the sound heard and amplifying it by adding strength to it. The human ear is the organ of hearing and helps in maintaining posture.
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