Bird
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Bird (bûrd)
Bird (pronounced: /bɜːrd/) is a term used to describe a group of warm-blooded vertebrates constituting the class Aves, characterized by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
Etymology
The word "bird" comes from the Old English "brid," which means "chick, hatchling."
Related Terms
- Avian: Pertaining to birds.
- Ornithology: The scientific study of birds.
- Feathers: The distinctive outer covering of birds.
- Beak: The hard, projecting part of a bird's mouth.
- Egg: The hard-shelled reproductive body produced by birds.
- Metabolism: The chemical processes occurring within a living cell or organism that are necessary for the maintenance of life.
- Heart: The organ in birds that pumps blood through the body.
- Skeleton: The internal framework of birds, made up of bones and cartilage.
See Also
External links
- Medical encyclopedia article on Bird
- Wikipedia's article - Bird
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