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Birds - Coggle Diagram
Birds
The body of birds
Skeleton: formed of hollow bones which the air flows through. This characteristic makes them light and facilitates their breathing, as the hollows of their bones, called air sacs, are connected to their lungs
Limbs: they have four, two legs and two wings.
Beak: a hard structure that constitutes the jaw of birds. They can be of different shapes, depending on the bird's feeding habits. They have no teeth.
Cloaca: this is the end of the digestive, urinary and reproductive tracts.
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Feathers: these are structures that cover the bird's body. They enable them to fly and to keep a constant body temperature in relation to the environment temperature. Long, flat feathers are called contour feathers, and small, fluffy feathers are called down feathers.
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environment
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They are descended from reptiles, but they are considered to be more evolved as they have a more developed nervous system
Some characteristics
They have a beak, but no teeth.
Two of their limbs are wings, which in the majority of cases allow them to fly.
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