aviary respiratory system and feathers mr. blackwood
TRANSCRIPT
Aviary Respiratory System and
FeathersMr. Blackwood
Introduction
• Respiratory system
• Feathers
Respiratory SystemDefine 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
Birds Breathe Better
• More efficient than mammals
• Transfer more oxygen with each breath
• Con - transfer toxins more effectively
Basics
• Birds have lungs
• Air sacs
• Air sacs of birds extend into bone in shoulder and elbow, thigh bone, back bone, and skull
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
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
Feathers
• Feathers• Epidermal growths
that form an outer covering on birds
What do they do?
• Aid in flight, thermal insulation, waterproofing, camouflage
• Protection form weather• Balance• Buoyancy for swimming• Protect from water
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
Anatomy of a Feather
• 1 Vane• 2 Rachis• 3 Barb• 4 Afterfeather• 5 Calamus, Hollow
shaft
Structure
• Hooklets and barbs add structure and slight rigidity to flight and tail feathers
• Downy Feathers are barbed but not hooked
Uses by Humans
• Since feathers trap heat well
• Used in bedding or mattresses, pillows, and blankets
• Coats and sleeping bags
• Arrows and fishing lures