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Vocab

QuestionAnswer
bird endothermic animal that has an outer covering of feathers, two legs covered with scales that are used for walking or perching, and front limbs modified into wings
feather structure made mostly of protein that develops from a pit in a bird's skin
endotherm animal that generates its own body heat and controls its body temperature from within
crop in earthworms, part of the digestive system in which food can be stored; in birds, structure at the lower end of the esophagus in which food is stored and moistened
gizzard in earthworms, part of the digestive system in which food is ground into smaller pieces; in birds, a muscular organ that helps in the mechanical breakdown of food
air sac one of several sacs attached to a bird's lungs into which air moves when a bird inhales; allows for the one-way flow of air through the respiratory system
Created by: 100critter