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Campbell Biology Chapter 42
Circulation and Gas Exchange
8
Biology
Undergraduate 2
03/06/2008

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Term
Blood
Definition
A type of connective tissue with a fluid matrix called plasma in which blood cells are suspended.
Term
Blood Vessels
Definition
A set of tubes which the blood moves through the body.
Term
Heart
Definition
A muscular pump that uses metabolic energy to elevate hydrostatic pressure of the blood. Blood then flows down a pressure gradient through blood vessels that eventually return blood to the heart.
Term
Blood Pressure
Definition
The hydrostatic force that blood exerts against the wall of a vessel.
Term
Open Circulatory System
Definition
A circulatory system in which fluid called hemolymph bathes the tissues and organs directly and there is no distinction between the circulating fluid and the interstitial fluid.
Term
Hemolymph
Definition
In invertabrates with an open circulatory system, the body fluid that bathes tissues.
Term
Sinus
Definition
Any of the spaces surrounding the organs and body in animals with open circulatory systems.
Term
Closed Circulatory System
Definition
A circulatory system in which blood is confined to vessels and is kept separate from the interstitial fluid.
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