Functions of blood

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Blood has three main functions :  Transport, Protection and regulation.
1. Transport : blood transports the following substances:
* Gases namely oxgen (O²) and carbon dioxide (CO²), between the lungs and rest of th  body.
* Nutrients from the digestive tract and storage sites to  rest of the body.
* Waste products to detoxified or removed by the liver and kidneys.
 Hormones from the glands in which they are produced to their target cells.
* Heat to the skin to regulate body temperature.
2. Protection : blood has several roles in inflammation:
* Leukocytes or white blood cells, destroy invading  microorganisms and canncer cells.
*  Antibodies and other proteine destroy pathogenic substances.
* Platelet factors initiate blood clotting and help to minimise blood loss.
3.  Regulation : blood helps to regulate:
* pH by interacting with acids and bases.
* Water balance by transferring  water to and from tissues.

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