3.2 The Auditory and the Vestibular Systems Flashcards
What is the sensory organ for hearing?
ear
What are the three divisions of the ear?
external
middle
inner
What does the external ear consist of?
auricle
external acoustic meatus
What is the auricle?
shaped to funnel sound waves into the external acoustic meatus
What is the auricle composed of?
elastic cartilage covered with thin skin making up the rim and lobule
What is the rim of the ear also known as?
helix
What is the lobule of the ear?
portion of auricle that lacks cartilage
What is the external acoustic meatus?
tunnel between the auricle and the tympanic membrane
What is the external acoustic meatus composed of?
elastic cartilage near auricle and becomes a cylinder through the temporal bone
What is the external meatus canal lined with?
hairs
glands that secrete cerumen
What is the eardrum known as?
tympanic membrane
What is the function of the tympanic membrane?
vibrations of the connective tissue will transmit sound waves to the middle ear
What is the middle ear also known as?
tympanic cavity
What is the middle ear composed of?
air filled cavity containing three small bones known as the ossicles
What are the ossicles?
malleus
incus
stapes
Which ossicle conveys sound vibrations to the inner ear?
stapes
What is the inner ear composed of?
the bony labyrinth and membranous labyrinth
What are the three sections of the bony labyrinth?
vestibule
semicircular canals
cochlea
What is the vestibule?
connects to the three semicircular canals
What is the Vestibular system?
equilibrium and balance system
