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a thin, whitish layer present at the erythrocyte-plasma junction.
Contains white blood cells (leukocytes)
45% of total blood volume
Distribution functions of blood include
O2 from lungs and nutrients from the digestive tract to all body cells.
metabolic waste from cells to elimination sites.
Hormones from endocrine organs to tartget organs.
Regulatory functions of blood include
body temp by absorbing and distributing heat to body and skin
normal pH in body tissue
adequate fluid volume in circulatory system w/ salts and blood proteins
Protective functions of blood include:
blood loss - proteins initiate clots
infection-antibodies, complement proteins & WBCs defend against invaders
staw-colored, sticky fluid
most abundant plasma solutes
60% of plasma protein
shuttles certain molecules thru circulation
important blood buffer
major blood protein to plasma osmotic pressure (sodium ions are the other)
45% total volume of blood
males - 47%...5%
females - 42%...5%