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The structure and the function of the blood in the circulatory system

The blood

The blood structure

The blood structure

The blood is a red liquid, It consists of the plasma, the blood platelets, the red blood cells (the corpuscles), and the white blood cells (The corpuscles).

The functions of the blood

The blood transfers the materials to all the body cells, where the red blood cells carry oxygen and carbon dioxide, and plasma transports the food, the vitamins, the salts, and the harmful wastes.

The blood protects the body, where the white blood cells attack the microbes that cause the diseases to the human, The blood platelets help in healing the wounds, and the blood keeps the temperature of the body constant.

The plasma

The plasma is a yellow watery fluid in which all the blood components are suspended. It carries the needed food substances to the body cells, and it carries the harmful wastes that formed in the cells to get rid of them, The blood is a fluid due to the presence of the plasma which is a watery fluid.

The blood platelets

The blood platelets are the small cell fragments. It helps in the coagulation of the blood (the formation of the blood clot), So they help in healing the wounds.

When the body is wounded and the blood exposed to the air, the platelets stick to prevent the bleeding and they heal the wounds.

The red blood cells (RBC’S)

The red blood cells are the red cells without the nuclei. They carry oxygen gas from the lungs to all the body cells, and they carry carbon dioxide gas from all the body cells to the lungs.

The white blood cells (WBC’S)

The white blood cells are the white cells with the different forms of the nuclei, and they defend the body against the microbes by attacking them.

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