Affordable Access

Publisher Website

DESIGN AND PHYSIOLOGY OF ARTERIES AND VEINS | The Retia

Authors
Publisher
Elsevier Inc.
Identifiers
DOI: 10.1016/b978-0-12-374553-8.00067-8
Keywords
  • Blood Vessels
  • Choroid
  • Circulation
  • Countercurrent Multiplier
  • Endothermy
  • Evolution
  • Eye
  • Gas Gland
  • Heat Exchanger
  • Rete
  • Retia
  • Retia Mirabilia
  • Retina
  • Shark
  • Swimbladder
  • Tuna
  • Vascular

Abstract

Abstract Some fishes have elaborate structures that consist of thousands of blood vessels arranged in parallel. These structures are called retia mirabilia. In tunas and some sharks, these structures function as countercurrent heat exchangers to conserve heat, thus enabling these fishes to maintain some parts of their body much warmer than ambient water. In other fishes, these structures function as countercurrent multipliers to increase the partial pressure of oxygen, thus enabling these fishes to secrete gas into their swimbladder or to supply oxygen at high partial pressure to the eyes.

There are no comments yet on this publication. Be the first to share your thoughts.