PSL 201 Lecture 1 - PSL 201 > Lecture 1 FUNCTION OF...

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PSL 201 > Lecture 1 FUNCTION OF BLOOD Transport Cellular waste: produced when molecules broken down ( Cells Kidneys) - Gases: ( 02 lungs-> tissue & C02 tissues to lungs) - Excess water: (carried by blood to kidney urination) - Hormones: carried by blood to target cells - Heat: Active tissue to Less active tissue Defence - transports cellular and molecular components of the immune system to the site of injury. - Blood clotting by haemostatic mechanisms prevents blood loss. pH Regulation - By buffering C02 + H20 -> h+ + HC03- ( H+ handled by Hb to regulate pH) - transports acids and bases to excretory organs (Kidney urine) Hematocrit - Blood volume occupied by RBC (viscosity increase (increase total peripheral resistance) = increase BP = heart work harder) - ( hemocrit – ratio –male 48% fem- 42 % --low hemocit = reduced 02 carrying capacity.) More fat means reduced blood volume. -
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PSL 201 Lecture 1 - PSL 201 > Lecture 1 FUNCTION OF...

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