Blood, “The River of Life” as it supports life. It contains the nutrients and oxygen that support living organisms. The cells in the blood are generally synthesized in the bone marrow by a process called haematopoiesis. Blood contains three types of blood cells, namely Erythrocytes or RBC, Leukocytes or WBC and Platelets. Almost half of the total blood is composed of blood cells. These cells are developed from the bone marrow. WBC can be sub-classified into 2 other groups, Granulocytes ... The average human adult has more than 5 liters (6 quarts) of blood in his or her body. Blood carries oxygen and nutrients to living cells and takes away their waste products. It also delivers immune cells to fight infections and contains platelets that can form a plug in a damaged blood vessel to prevent blood loss. Learn about the three types of blood cells: red, white and platelets, and their roles in transport, immunity and clotting. Find out the characteristics, life spans and functions of each cell type, and see examples of microscopic images. There are mainly 3 types of Blood cells: Red, White and Platelets. 1. Red Blood Cells (Erythrocytes) Red blood cells are the most common type of blood cell. RBC are small, round, and have a unique donut-like shape without a hole in the middle. This shape helps them move easily through blood vessels.
