What is Immunity?

Immunity means being protected from something and being unaffected or not bothered by it.

What are the two types of immunity?

There are two types of immunity innate immunity and adaptive immunity. Plants and animals have what is called an innate immunity. Innate immunity if the first line of defense against pathogens. it involves several cell types, proteins, and even an organ, your skin. your skin protects you and prevents pathogens from getting inside your body. Adaptive Immunity works slower than the innate system, and is more specific. There are two types passive and active. Passive immunity occurs when antibodies are passed from one person to another, as through transfusion. The active immunity involves two types of white blood cells T-cells and B-cells.

The immune system protects the body against disease or other potentially damaging foreign bodies. When functioning properly, the immune system identifies and attacks a variety of threats, including viruses, bacteria and parasites, while distinguishing them from the body's own health issues. Sometimes, one of your cells changes, or mutates, giving the cell the ability to multiply continuously.

How does the body protect itself against foreign bodies?

What is the role of antigens?

When an antigen enters the body, it stimulates the immune system to produce antibodies. Antigens are any substance that stimulates the immune system to produce antibodies. Antigens can be bacteria, viruses, or fungi that cause infection and disease.

The main function of endocrine glands is to secrete hormones directly into the bloodstream. hormones are chemical substance that affect the activity of another part of the body. In essence, hormones serve as messengers, controlling and coordinating activities throughout the body.

What is the role of hormones?

What is the role tumor necrosis factor?

The tumor necrosis factor exert host-damaging in sepsis, in tumor cachexia as well as in autoimmune diseases.