HIGHLIGHTS
SUMMARY
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ACRONYMS
LAY DEFINITIONS
- bird: Birds are a group of warm-blooded vertebrates constituting the class Aves characterised 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. Birds live worldwide and range in size from the 5.5 cm (2.2 in) bee hummingbird to the 2.8 m (9 ft 2 in) ostrich
- ossification: Ossification in bone remodeling is the process of laying down new bone material by cells . . .
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