Answer:
Tonsils are the two lymph nodes located on each side of the back of your throat. They function as a defense mechanism and help prevent your body from getting an infection. When tonsilsbecome infected, the condition is called tonsillitis. Tonsillitis can occur at any age and is a common childhood illness.
Any substance that induces the immune system to produce antibodies against it is called an antigen. Any foreign invaders, such as pathogens (bacteria and viruses), chemicals, toxins, and pollens, can be antigens. Under pathological conditions, normal cellular proteins can become self-antigens.
The spleen recognises old, or damaged red blood cells and removes them from your bodyby breaking them down and saving any useful components, such as iron, in the process. This keeps the blood circulating in your body clean and functioning at its best.
The thymus is a specialized primary lymphoid organ of the immune system. Within the thymus, thymus cell lymphocytes or T cells mature. T cells are critical to the adaptive immune system, where the body adapts specifically to foreign invaders.
This is up to question 4
Explanation:
