Feathers aus Wikipedia.
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Feather - Wikipedia, the free encyclopedia
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Feather
From Wikipedia, the free encyclopedia
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Feathers)
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For other uses, see
Feather (disambiguation).
It has been suggested that
Barb (feather) and
Barbule be
merged into this article or section. (
Discuss)
Feather variations
Feathers are one of the and indeed a premier example of a complex evolutionary novelty. They are among the characteristics that distinguish the extant
Contents
Structure and characteristics
Parts of a feather:
1. Vane
2. Rachis
3. Barb
4. Afterfeather
5. Hollow shaft, calamus
Featherstructure of a
Blue-and-yellow Macaw
Budgerigar feather, magnified, showing interlocking barbules
Feathers are among the most complex
integumentary appendages found in
vertebrates and are formed in tiny follicles in the
epidermis, or outer skin layer, that produce
keratin mehrFeathers aus Wikipedia.
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