A&P - Chapter 24 (Part 2) Flashcards
How many auditory ossicle bones are there in the middle ear?
3
What are the 3 auditory ossicle bones in the middle ear?
- Malleus
- hammer - Incus
- anvil - Stapes
- stirrup
What is the tympanic membrane?
Ear drum
Where does the middle ear end?
In the oval window
- opening into the ear
What does the auditory (eustachian) tube connect?
The middle ear to the throat
Otitis media
Middle ear infection
What is the round window?
An opening into the inner ear
-covered by a membrane
What does the inner ear contain?
Body labyrinth
What does the body labyrinth surround?
A membranous labyrinth
How many structures does the bony labyrinth consist of?
3
What are the 3 structures that make up the bony labyrinth?
- Vestibule
- Semicircular canal
- Cochlea
What is the semicircular canal involved with?
Balance
What is the cochlea involved with?
Hearing
What does the membranous labyrinth contain?
2 membranous sacs
What are the 2 membranous sacs found in the membranous labyrinth called?
- Utricle
2. Saccule
What are the 2 fluids found in the inner ear?
- Perilymph
2. Endolymph `
What is perilymph fluid similar to?
CSF
- cerebrospinal fluid
Where is perilymph located?
Inside the bony labyrinth
What does perilymph do?
It fills the space between the membranous labyrinth and the body labyrinth (around the membranous labyrinth)
- peri = around
Where is the endolymph located?
Inside the membranous labyrinth
Endolymph
Is a clear fluid
What is endolymph fluid rich with?
Potassium
Organ of corti
Specialized hair cells on a structure
Where do you find organ of corti?
In the cochlear duct
When do organ of corti respond?
When they are bent by the movement of surrounding endolymph set in motion by sound waves
