Anatomy of the Ear

What is the name of # 3?

• Malleus

• Helix

• Auricle (Pinna)

• Tympanum (ear drum)

What is the function of # 3?

• Collect soundwaves and direct them into the external acoustic meatus

• Secrete a waxy substance known as cerumen

• Amplify and transmit vibrations of the tympanum inward to the inner ear

• Connect the middle ear cavity to the nasopharynx

What part contains the ceruminous glands (which secrete cerumen/ear wax)?

• 4

• 7

• 8

• 9

Where is the tympanic membrane?

• 4

• 6

• 7

• 8

What is # 7?

• Middle ear

• Nasopharynx

• Pharyngotympanic (auditory) tube

• Auditory ossicle

What is the function of the auditory ossicles (# 1,2,3)?

• Connect the middle ear cavity to the nasopharynx

• Perform the attenuation reflex

• Contain the receptor structures for hearing

• Amplify and transmit vibrations of the tympanum inward to the inner ear

What is # 3?

• Temporal bone

• Cochlea

• Vestibule

• Endolymph

What is the function of # 3?

• Contains receptors that send impulses that the brain interprets as sounds

• Contains sensory receptors for equilibrium

• Contains perilymph which suspends the membranous labyrinth

• Surrounds the Eustachian tube and swells due to upper respiratory infection

Which two numbers make up the vestibular complex?

• 1 & 2

• 4 & 5

• 6 & 7

• 3 & 8

What is the function of the vestibular complex?

• Contains sensory receptors for equilibrium. Sends nerve impulses that brain interprets as body position or movement.

• Contains receptors that send impulses that the brain interprets as sounds.

• Surrounds the Eustachian tube and swells due to upper respiratory infection.

• Amplify and transmit vibrations of the tympanum inward to the inner ear.