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Define composition and function of blood.

Last updated date: 20th Jun 2024
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Hint: Blood is one of the vital components of life. Anyone who has the circulatory system has blood. Blood is a fluid connective tissue which circulates in whole our body delivering oxygen and nutrients to various cells and tissues. It carries 8% of our body weight. Adults possess around 5-6 liters of blood.

Complete Answer:
- Blood is a special fluid of connective tissue and has the two types of cells: Red blood cells and white blood cells.
- Red blood cells are also called Erythrocytes. RBCs don’t have the nucleus and the biconcave in shape. Red blood cells are rich in iron called Haemoglobin which gives blood its red colour.
White blood cells also known as Leukocytes. Leucocytes have no colour because they do not have the Haemoglobin.
- They are two types: granulocytes are those having the granules in the cytoplasm (Eosinophils, Basophils and Neutrophils) and agranulocytes are those do not have the granules in the cytoplasm (Monocytes, Lymphocytes, and Platelets).

Correct answer:
There are so many cellular compounds present in the blood that are plasma, RBCs, WBCs, and platelets.

Functions of blood: Fluid connective tissue, Provide oxygen to cells, transport hormones, carry nutrients, maintain the balance, transport waste to kidney and liver, blood clotting and blood cells act against the infection in our body.

Note: Haemoglobin is the main component which contains heme to provide the red colour to the blood. Granulocytes contain enzymes for digestion and agranulocytes provide immunity.