The Four Major Components And Function Of Blood

2010 Words 9 Pages
Sandra Peart.

Biology Assignment 2



Major Components & Function of Blood.

The four major Blood Components are


•red cells

•white cells


•Plasma is the liquid part of the blood that is made up of 55% fluid, this is the blood’s liquid medium, by itself is straw-yellow in colour. The total volume of blood plasma is about 2.7-3.0 litres in human. The plasma carries carbon dioxide , hormones and waste.

•Red blood cells

•The red blood cells are called erythrocytes, the red blood cells contain hemoglobin which carries oxygen.

•Made in the bone marrow. The more you train the more blood cells are produced.

•White blood cells

•The white blood cells are called leukocytes. White blood cells fight
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•Platelets helps blood clotting, it is used to treat cases of bone marrow failure

•Following a transplant or chemotherapy treatment

•Can also be used to treat leukaemia.


•Plasma is the fluid that carries all blood cells and components.

•Plasma contains all the proteins which is need in the body.

•Plasma contains, albumin-a protein which is useful in treating kidney and liver diseases

•Clotting factors which is used to treating certain types of haemophilia and diseases.

•Immunoglobulins- these are antibodies which is used as a protection against infections.

Functions of blood

•Transport: Blood is the primary means of transporting nutrients throughout the body, for instance Glucose, amino acids, vitamins, and minerals are carried from the small intestine to cells in the body

•Red blood cells carries oxygen from the lungs to body body cells.

•Blood helps in getting rid of carbon dioxide, ammonia, urea, and other waste products.

•The hormones are internal secretion which helps to control the important body processing , which is being transported by the blood to the organs.

•Defence: The white blood cells which is otherwise known as leukocytes is for fighting infection and
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Fibrin clot formation is a cascade, in which the product of each step is an enzyme or cofactor needed for following reactions to worked efficiently.

2: The role of clotting factors in blood in the formation of the clot.

Blood clotting take place when blood is transform from liquid to a gel.

The blood vessel is lined with a thin layer of tissues’’ (endothelial cells)’’ under normal situations produce a chemical

Messenger that inhibits platelet activation. When the layer of the endothelial is damaged the collagen is exposed,

They release other factors in the bloodstream which attracts platelets to the site of the wound.

After platelets are activated they clamp together to form a plug’’ (fibrin clot)’’. The clotting factors need vitamin K to function. The clot will last for a number of days in order to stop the loss of blood.

The blood clotting cascade is divided into three portions,the extrinsic pathway, the intrinsic pathway, and the common pathway. The extrinsic pathway begins when clotting of the blood escaped into the tissues, and the intrinsic

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