1. 1-18
Open your notes to page 24. I will be stamping this page for questions
Copy the following EQ onto a new page of notes
(page 27)
EQ: what is the structure and function of the inner ear?

2. The Inner Ear:The Vestibule
The central egg-shaped cavity
House equilibrium receptors

3. The Vestibule
Figure 15.27

4. The Semicircular Canals
Three canals
Membranous semicircular ducts line each canal and communicate with part of the semicircular canal
houses equilibrium receptors

5. The Semicircular Canals
Figure 15.27

6. The Cochlea A spiral, conical, bony chamber: Filled with fluid
Contains hair cells that move
Sound organ

7. The Cochlea
Figure 15.28

8. Sound and Mechanisms of Hearing
Sound waves create vibrations
Vibrations beat against the eardrum and ossicles
The bones hit the cochlea which moves the cochlear hair cells
Moving hair cells stimulates the cochlear nerve that sends impulses to the brain

9. Mechanisms of Equilibrium and Orientation
equilibrium receptors in the semicircular canals and vestibule
Maintains our orientation and balance in space
Respond to gravity and changes in the position of the head
Tiny hairs cells and fluid found in the vestibule and semicircular canals respond to motion
As the head moves, the hairs and fluid moves

10. The Vestibule
Figure 15.27