Blood is composed of plasma, red blood cells, white blood cells, and platelets. Plasma is 90-92% water and contains organic compounds like proteins, amino acids, enzymes, vitamins, glucose, and hormones to transport nutrients and regulate processes in the body. It also holds inorganic salts and ions to maintain osmotic balance and support clotting. Red blood cells carry oxygen, white blood cells fight infection, and platelets assist in clotting.

2. Blood
Plasma Blood cells
Water Inorganic Organic RBC WBC Platelets
compounds compounds

3. BLOOD
COMPONENTS FUNCTIONS
(A) PLASMA
(1) Water (90 – 92%)  Transport of Vitamins and hormones
(2) Organic compounds
Albumin  Control blood pressure
(a). Protein Globulin  Function as antibodies
Fibrinogen  Help in clotting of blood
(b). Aminoacids
(c). Enzymes
(d). Vitamins Growth and repair of body
(e). Glucose
(f). Urea
(g). Uricacid
(h). Hormones  Controls body function
(3). Inorganic compounds
Salt and ions of Na, K and Ca  Maintain osmotic balance
Help in clotting of blood
Working of muscles