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Type of heart a bird has
The oxygenated air inhaled by birds goes through the trachea and into these structures
These organisms share many characteristics with reptiles, like amniotic eggs and scales
Part of the brain that coordinates movement and balance during flight
Feathers that cover the body, wings and tail
Structure that stores food
Feathers that are soft, trap air and act as insulation
An organism that is able to generate its body heat internally by its own metabolism
Structures that are specialized outgrowths of skin involved in flight and insulation
Structure that grinds food
In the case of animals, to sit on eggs to keep them warm
Fibrous protein that makes up feathers and hair
Part of the brain that controls automatic functions such as respiration and heartbeat
Type of circulation in birds
Organ that secretes waterproofing oil for feathers
Wastes excreted by birds