Different Types of Blood Cells and Their Roles in the Human Body Blood is a mixture of two things: cells and plasma. The heart pumps blood through the arteries, capillaries, and veins to provide oxygen and nutrients to every cell of the body. The blood also...
White blood cells (WBCs), or leukocytes, are a part of the immune system and help our bodies fight infection. They circulate in the blood so that they can be transported to an area where an infection has developed. In a normal adult body there are 4,000 to...
Function of Red blood cells The main function of red blood cells, or erythrocytes, is the transport of oxygen from the lungs to body tissues. Erythrocytes are tiny disc-shaped structures that are hollowed out on either side. Their small size allows them to squeeze...
