Ear Physiology External Ear External Ear is covered
- Slides: 10
Ear Physiology
External Ear • External Ear is covered in skin. • Auricle- collects sound waves (Kinetic Energy) • External Auditory Meatus- Funnels sound to ear drum – Cerumen- (Ear Wax) – Ear hair • Ear Drum
Cerumen • The purpose of wax: – Repels water – Trap dust, sand particles, micro-organisms, and other debris – Keep External Auditory Meatus clear – Odor discourages insects – Antibiotic, antiviral, antifungal properties – Cleanse ear canal
External Ear Care Hazardous to health: • Ear candling • Swabs • Foreign objects
Middle Ear • Ear drum turns Kinetic energy into Mechanical Energy • Energy travels though the 3 bones to the inner ear
Eustacian Tube • Works as a valve that opens and closes when you swallow or yawn – Allows you to “even pressure” – Without this, the pressure outside your ear would cause your Tympanic Membrane to bow inward (effecting ability to hear) • Allows for infection to drain to the back of the nose – Reason why babies get ear infections easily
Inner Ear… • Mechanical Energy is then changed to Hydraulic Energy (impluses the brain can understand) in the Cochlea – Cochlea has tiny hairs (Cilia) that transports the energy – Cochlea is full of liquid – If you were to roll out the cochlea, it would look like a garden hose
…Inner Ear • Semicircular Canals – On the X, Y, and Z axis – Full of fluid that affects your balance – When you spin around, you get dizzy because of your Semicircular Canals • Nerves – Takes info to the brain
Physiology of external ear
An animal with ears like leaves name
Animals who have ears but we cannot see
Weber rinne
Sensory supply of ear
External-external trips
Pk papyrus covered coronary stent system
Four living creatures covered with eyes
Month’s living expenses covered ratio
A gas cylinder and piston are covered with heavy insulation
31 spinal nerves
