Weichert, Charles K. College of Arts and Sciences, University of Cincinnati, Cincinnati, Ohio.
Jones, David R. Department of Zoology, University of British Columbia, Vancouver, Canada.
Last reviewed:November 2016
Show previous versions
- Arterial system
- Venous system
- Circulatory physiology
- Links to Primary Literature
- Additional Readings
The set of structures, such as the heart (or pumping mechanism) and the arteries, veins, and capillaries, which provide channels for the flow of blood. The cardiovascular system (Fig. 1) is sometimes called the blood-vascular system. The circulatory system includes both the cardiovascular and lymphatic systems; the latter consists of lymph channels (lymphatics), nodes, and fluid lymph, which finally empties into the bloodstream. With regard to vertebrates, all animals in this grouping feature a closed system of branched vessels, a ventral heart, and a basic pattern of organization that ranges from the single system in most fishes to the double system in terrestrial forms. Embryologically, the cardiovascular system in vertebrates arises from the splanchnic mesoderm, with the first blood and vessels formed in the wall of the yolk sac. See also: Blood; Circulation; Developmental biology; Embryology; Lymphatic system; Vertebrata; Yolk sac
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 9000 highly qualified scientists and 43 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information