State the functions of blood

Blood helps in the breakdown of digested food, it has Erthrocytes which transport oxygen ti all body tissues. It has leukocytes which protect immune system against various allergies, infections and diseases and has platelets which helps in plugging of damaged blood vessels and helps blood to clot. It has plasma which helps in transporting large organic molecules

Blood is responsible for the following body functions:

Fluid Connective Tissue: Blood is a fluid connective tissue composed of 55% plasma and 45% formed elements including WBCs, RBCs, and platelets. Since these living cells are suspended in plasma, blood is known as a fluid connective tissue and not just fluid.

Provides oxygen to the cells: Blood absorbs oxygen from the lungs and transports it to different cells of the body. The waste carbon dioxide moves from the lungs to the blood and is exhaled.

Transports Hormone and Nutrients: The digested nutrients such as glucose, vitamins, minerals, and proteins are absorbed into the blood through the capillaries in the villi lining the small intestine.

The hormones secreted by the endocrine glands are also transported by the blood to different organs and tissues.

Homeostasis: Blood helps to maintain the internal body temperature by absorbing or releasing heat. When the blood vessels react to outside organisms and changes in internal temperature, they expand and contract. This moves the blood and heat closer to or away from the skin surface.

Blood Clotting at Site of Injury : The platelets help in the clotting of blood at the site of injury. The platelets form a clump at the damaged area. Fibrins are formed to complete the clot.

Transport of waste to the Kidney and Liver: Blood enters the kidney where it is filtered to remove nitrogenous waste out of the blood plasma. The toxins from the blood are also removed by the liver.

Protection of body against pathogens: The White Blood Cells fight against infections. They multiply during the infections.