Question

In: Nursing

describe how a closed circulatory system delivers oxygen and nutrients and picks up waste and carbon...

describe how a closed circulatory system delivers oxygen and nutrients and picks up waste and carbon dioxide. What types of organisms use a closed circulatory system?

Expert Solution

* Closed circulatory system

- blood within the vessels different size and wall thickness , blood is pumped by vessels and does not normally fill body cavities . Blood flow is not sluggish.

- heart pumps blood to the body and receives blood returned to the heart .

- system include two type of circulation : single circulation and double circulation .

* Single circulation occurs in fish :

- blood emtering the heart and collects in atrium before entering ventricel .

- ventricle pumps blood into gills

- has exchange occurs in gills , oxygen rich blood carry in a vessel to capillary bed .

- gas exchange occurs in body of capillary amd oxygen poor blood returend to the heart .

* Double circulatory system

- systemic circuit includes blood vessels that carry blood to the body .

- pulmonary circuit includes the blood vessels that send blood to lungs .

- right circuit delivers oxygen poor blood from the heart to the lungs

- in left circuit the oxygen rich blood leaves the heart into capillary beds , organs and tissues.

* What type of organsisms used closed circulatory system .

- vertebrates

- echinoderms

Nightingale answered 2 days ago

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