Thursday 30 April 2020
Discuss the composition and functions of mammalian blood
Mammalian blood consists of two main components:
Blood plasma; and the blood cells; (Red blood cells/Erythrocytes, White blood
cells/Leucocytes and Platelets/Thrombocytes); Blood plasma transport nutrients (glucose, amino acids, vitamins,
fatty acids and glycerol, dissolved oxygen) to tissues; transports hormones,
enzymes/metabolic regulators to target organs and tissues; Transport excretory
substances/wastes from the cells; to excretory organs for elimination from the
body; Distribute heat energy; helping in thermoregulation; transports/contains
water, plasma proteins and dissolved mineral salts; important in
osmoregulation; Suspends blood cells; Red blood cells transport oxygen; and
dissolved carbon (IV) oxide; helps in regulation of pH; White blood cells help
in protection/immunity; by engulfing or producing antibodies to kill/destroy
invading micro-organisms/pathogens; Platelets help in blood clotting;
preventing excessive blood loss; entry of pathogens; and promotes healing of
wounds; Acc. Adaptive features
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