1. Aviary Respiratory System and Feathers
Mr. Blackwood

2. Introduction
Respiratory system
Feathers

3. Respiratory System Define the System
Respiratory system delivers oxygen from the air to the tissue and removes carbon dioxide.
Plays role in regulating body temperature
Different form other vertebrates
Cycles inspiration and expiration

4. Birds Breathe Better More efficient than mammals
Transfer more oxygen with each breath
Con - transfer toxins more effectively

5. Basics Birds have lungs Air sacs
Air sacs of birds extend into bone in shoulder and elbow, thigh bone, back bone, and skull

6. Unidirectional Flow
Most mammals have BIDIRECTIONAL flow - moving back and forth and into and out of the lungs
Air coming into mammals lungs is mixed with old air -
less oxygen
Birds have UNIDIRECTIONAL flow
Fresh air and has high oxygen content

7. More
Air is moved into and out of respiratory system with pressure changes in air sacs
Muscles in chest cause sternum to to push outward
Causes air to enter air sacs
Other muscles contract to push air out

8. Visual Respiration
cool link

9. Feathers
Feathers
Epidermal growths that form an outer covering on birds

10. What do they do?
Aid in flight, thermal insulation, waterproofing, camouflage
Protection form weather
Balance
Buoyancy for swimming
Protect from water

11. Types of Feathers Tail feather - balanced left and right of center
Flight feathers have a narrower and wider side
Semiplume and downy feathers are good for warmth
Filoplume are found around tail and flight feathers used for sensing feather maintenance
All feathers have similar parts

12. Anatomy of a Feather 1 Vane 2 Rachis 3 Barb 4 Afterfeather
5 Calamus, Hollow shaft

13. Structure
Hooklets and barbs add structure and slight rigidity to flight and tail feathers
Downy Feathers are barbed but not hooked

14. Uses by Humans Since feathers trap heat well
Used in bedding or mattresses, pillows, and blankets
Coats and sleeping bags
Arrows and fishing lures