The role of theimmune system is to protect against disease or its causes, which can be harmful. When the immune system is functioning properly, it identifies a variety of threats, including viruses, bacteria, and parasites, and distinguishes them from the healthy tissues of the body.
The main components of theimmune system include:
The spleen: The largest lymph system in the body, which is on the left side,
under its ribs and above your stomach, contains white blood cells that fight infection or disease.
The spleen also helps control the amount of blood in the body and gets rid of old or damaged blood cells.
Yellow tissue in the center of the bone produces white blood cells.
This spongy tissue inside some bones, such as the femur and thigh bone, contains immature cells, called stem cells.
Lymphocytes: Small white blood cells play a large role in defending the body against disease.
Thymus: The thymus gland is somewhat large in infants, and grows into adulthood, then begins to slowly shrink and be replaced by fat with age.
Leukocytes: These disease-fighting white blood cells identify and eliminate pathogens and are the second arm of the innate immune system. An elevated white blood cell count is referred to as leukocytosis.
Immunodeficiency causes an increase in the chances of infection with various diseases, and therefore attention must be paid to strengthening the immune system, and weak immunity can be discovered through some of the symptoms that appear in the body.
The immune system is the first line of defense against foreign bodies such as germs and bacteria that can cause diseases, and therefore attention must be paid to maintaining the health of the immune system to resist diseases.