Blood. 17. Overview of Blood Circulation. Blood leaves the heart via arteries that branch repeatedly until they become capillaries Oxygen (O 2 ) and nutrients diffuse across capillary walls and enter tissues Carbon dioxide (CO 2 ) and wastes move from tissues into the blood.
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Plasma(55% of whole blood)
Buffy coat:leukocyctes and platelets(<1% of whole blood)
Erythrocytes(45% of whole blood)
Withdraw blood and place in tube
InterActive Physiology®: Respiratory System: Gas Transport