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Birds - Coggle Diagram
Birds
Feathers: derived from scales
Help maintain a bird's body temperature.
Help maintain skin dry
Help with courting
Help with flight
Flight
Minimize bird's weight to fly
Lighter bones
No bladder
Beak made of keratin
Larger, immobile eyes to help see better when flying
Flexible neck to rotate head to see due to immobile eyes
Flight muscles attached to keel of sternum and upper limbs
High metabolism due to flight
4-chambered heart
Rapid heartbeat/blood flow
Endothermic
Air sacs provide enough oxygen for the birds
Vertebrates: birds are animals that have backbones.