Function of blood
Blood is primary transport medium that perform vital pick up and delivery services for the body. Red liquid that circulate in arteries and veins of body carrying oxygen to and carbon dioxide from tissue of the body.
1. Transportation
2. Maintenance and regulation
3. Protection
1. Transportation
1. Respiratory
1. Blood transport O2 from lungs to body tissue.
2. Blood transport CO2 from body tissue to lung.
2. Nutrition
Blood transport nutrients from alimentary canal.
3. Hormones
Blood transports hormones from endocrine gland to their target glands and tissues.
4. Excretory
It transport waste product from tissue to ( excretory organ) to kidney
Example; urea,.uric acid, water
It transport heat produced in the body parts.
Vitamin D produce in skin and transported by blood into liver, then kidney for processing active vitamin D.
Active vitamin D transported in blood to small intestines, where it prevent calcium loss from kidney.
2. Maintenance.and Regulation
1. Perform Haemostasis
Blood regulates acid base balance (PH) through distribution of buffers.
Water and electrolytes
It regulates amount of water and electrolytes in body fluids. (Na, Ca, K, Cl, P, Mg)
2. Regulate body temperature
It regulates body temperature mainly by increasing or decreasing the blood flow to the skin.
Blood is the key stones of body's heat regulating mechanism.
3. Protection
1. Collecting mechanism
Blood collecting mechanism protects against blood loss.
Cells and chemicals of blood constitute important part of immune system protecting against foreign substance.
Phagocytic WBC
Antibodies
Interferon and complement protect against foreign microbes and toxins.
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