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01, Jul, 2017
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BODY WALL OF BIRDS (AVES)

Written by  on Saturday, 01 July 2017 19:50
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BODY WALL OF BIRDS (AVES) BODY WALL OF BIRDS (AVES)

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The body wall of birds has three regions, Skin, Muscles and Perito­neum.
 
  1. The skin is dry. It shows upper stratum corneum, which has flat cornified cells. The feathers cover the body. Dermis shows musculo-fibrous tissue. The muscles help to raise and lower the feathers. It is supplied with blood vessels and nerve fibres.
  2. Glands are absent in the skin of a bird except preen gland which is located on the upper surface of the tail. Its secretions keep the feathers water proof.
  3. Muscles: Below the skin Muscles are present. In birds skeletal muscles are well developed. The flight muscles are well developed which help to raise and lower the wing.
  4. Peritoneum: A thin epithelium called peritoneum will cover the inner surface of the muscles.
  5. In birds skin sweat glands are absent and hence bird cools itself in hot environment by panting.
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