Ear Structure And Function Pdf

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ear structure and function pdf

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The ear is the sense organ that enables us to hear.

The pinna is a projecting elastic cartilage covered with skin. Its most prominent outer ridge is called the helix. The lobule is the soft pliable part at its lower end composed of fibrous and adipose tissue richly supplied with blood capillaries. It is sensitive as well as effective in collecting sound waves.

Anatomy and physiology of the ear

Anyone can learn for free on OpenLearn, but signing-up will give you access to your personal learning profile and record of achievements that you earn while you study. Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available. Figure 1 is a diagram of the human ear. The outer ear consists of the visible part of the ear or pinna , the external auditory canal meatus , and the tympanic membrane tympanum or eardrum. The human pinna is formed primarily of cartilage and is attached to the head by muscles and ligaments.

Human ear , organ of hearing and equilibrium that detects and analyzes sound by transduction or the conversion of sound waves into electrochemical impulses and maintains the sense of balance equilibrium. The human ear, like that of other mammals , contains sense organs that serve two quite different functions: that of hearing and that of postural equilibrium and coordination of head and eye movements. Anatomically, the ear has three distinguishable parts: the outer, middle, and inner ear. The outer ear consists of the visible portion called the auricle , or pinna, which projects from the side of the head, and the short external auditory canal , the inner end of which is closed by the tympanic membrane , commonly called the eardrum. The function of the outer ear is to collect sound waves and guide them to the tympanic membrane.

Anatomy and physiology of the ear

Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. DOI: Webster Published Medicine, Biology American zoologist. The acoustic portions of the mammalian ear display greater morphological diversity in peripheral than in central portions.

The ear is the organ of hearing and, in mammals, balance. In mammals, the ear is usually described as having three parts—the outer ear , the middle ear and the inner ear. The outer ear consists of the pinna and the ear canal. Since the outer ear is the only visible portion of the ear in most animals, the word "ear" often refers to the external part alone. The inner ear sits in the bony labyrinth , and contains structures which are key to several senses: the semicircular canals , which enable balance and eye tracking when moving; the utricle and saccule , which enable balance when stationary; and the cochlea , which enables hearing. The ears of vertebrates are placed somewhat symmetrically on either side of the head, an arrangement that aids sound localisation. The ear develops from the first pharyngeal pouch and six small swellings that develop in the early embryo called otic placodes , which are derived from ectoderm.

The ear is an organ of hearing and an organ of balance. It consists of the outer, middle, and inner ear. The outer ear includes the pinna the part you see that is made of cartilage and covered by skin, fur, or hair and the ear canal. The pinna is shaped to capture sound waves and funnel them through the ear canal to the eardrum. The pinnae are mobile and can move independently of each other, allowing horses to locate multiple sounds at the same time. In general, horses hear slightly better than people and are able to hear sounds at both higher and lower frequencies. The middle ear includes the eardrum and a small, air-filled chamber that contains 3 tiny bones: the hammer, anvil, and stirrup.


This chapter will deal mainly with the ear, first its structure and then its function, for it is the ear that is mainly at risk from hazardous sounds. The ears are paired.


human ear structure and function pdf

External auditory canal or tube. This is the tube that connects the outer ear to the inside or middle ear. Tympanic membrane eardrum.

Principles of Hearing Aid Audiology pp Cite as. The ear Figure 2. Unable to display preview. Download preview PDF. Skip to main content.

Hearing and Sound Communication in Fishes pp Cite as. One of the most striking features in the auditory system of fishes is the extensive structural diversity in the inner ear and its peripheral accessories. In this chapter we will summarize this diversity in the ear, from the gross structure to the ultrastructure of the sensory epithelia, and suggest some of the possible functional meanings for these structural differences. We hope that this discussion will stimulate interest in pursuing direct experimentation on the function of the fish ear in order to fill in the gaps in our understanding of peripheral auditory mechanisms.

Ear anatomy

My friend sent me a link to to tis site. The ear is the sensory organ of sound.

Ear Structure and Function in Horses

The pinna is a projecting elastic cartilage covered with skin. Its most prominent outer ridge is called the helix. The lobule is the soft pliable part at its lower end composed of fibrous and adipose tissue richly supplied with blood capillaries. It is sensitive as well as effective in collecting sound waves. It is a tubular passage supported by cartilage in its exterior part and by bone in its inner part.

Он торопливо повернул выключатель. Стекла очков блеснули, и его пальцы снова задвигались в воздухе. Он, как обычно, записал имена жертв. Контакты на кончиках пальцев замкнулись, и на линзах очков, подобно бестелесным духам, замелькали буквы.

Сьюзан ощутила угрызения совести. - Я тоже хватила через край. Извините. Дэвид - это отличная кандидатура. Стратмор отрешенно кивнул: - Он вернется сегодня вечером. Сьюзан представила себе, что пришлось пережить коммандеру, - весь этот груз бесконечного ожидания, бесконечные часы, бесконечные встречи. Говорили, что от него уходит жена, с которой он прожил лет тридцать.


Pinna. = outer portion of ear used to collect sound waves. 2. Auditory Canal = tube that sound travels down. 3. Ear Drum. = membrane that sends sound waves​.


Он показал на прилавок, где лежала одежда и другие личные вещи покойного. - Es todo. Это. - Si.

Human Ear: Structure and Functions (With Diagram)

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