1. 1/17/19
Open your notes to page 18. I will be checking for a summary on this page(s)
Also be ready to flip to pages 20 and 22. I will be checking for questions and summaries on this page as well
Copy the following onto a new sheet of paper: Page 25
EQ: What is the structure and function of the ear?

2. The Ear: Hearing and Balance
The three parts of the ear are the inner, outer, and middle ear
The outer and middle ear are involved with hearing
The inner ear functions in both hearing and equilibrium
Receptors for hearing and balance:
Respond to separate stimuli
Are activated independently

3. Outer Ear External auditory canal Tympanic membrane (eardrum)
Short, curved tube filled with gland
Tympanic membrane (eardrum)
Thin membrane that vibrates
Transfers sound energy to the middle ear

4. Middle Ear (Tympanic Cavity)
A small, air-filled, mucosa-lined cavity
Pharyngotympanic tube – connects the middle ear to the nasopharynx
Equalizes pressure

5. Middle ear: Ossicles
The tympanic cavity contains three small bones (ossicles)
the malleus (hammer), incus (anvil), and stapes (stirrup)
Vibrate when sound hits them