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Professional Nursing Practice (NURSING302) Blood - Study For State Exam

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John Marsh
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University of Auckland

Professional Nursing Practice (NURSING302)

Blood – Study for state exam

Functions of the Blood
Blood is unique; it is the only fluid tissue in the body.
1. Carrier of gases, nutrients, and waste products. Oxygen enters blood in
the lungs and is transported to cells. Carbon dioxide, produced by cells, is
transported in the blood to the lungs, from which it is expelled. Ingested nutrients,
ions, and water are carried by the blood from the digestive tract to cells, and the
waste products of the cells are moved to the kidneys for elimination.
2. Clot formation. Clotting proteins help stem blood loss when a blood vessel is
injured.
3. Transport of processed molecules. Most substances are produced in one part of
the body and transported in the blood to another part.
4. Protection against foreign substances. Antibodies help protect the body from
pathogens.
5. Transport of regulatory molecules. Various hormones and enzymes that regulate
body processes are carried from one part of the body to another within the blood.
6. Maintenance of body temperature. Warm blood is transported from the inside to
the surface of the body, where heat is released from the blood.
7. pH and osmosis regulation. Albumin is also an important blood buffer and
contributes to the osmotic pressure of blood, which acts to keep water in the
blood stream.

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Professional Nursing Practice (NURSING302) Blood - Study For State Exam

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