MICROANATOMY

Detailed explanation-1: -foreign proteins that gain access to the body through cuts and scrapes through the digestive or circulatory systems, or through the urinary and reproductive systems are called. antigens.

Detailed explanation-2: -The immune system can be activated by a lot of different things that the body doesn’t recognize as its own. These are called antigens. Examples of antigens include the proteins on the surfaces of bacteria, fungi and viruses.

Detailed explanation-3: -A macrophage is the first cell to recognize and engulf foreign substances (antigens). Macrophages break down these substances and present the smaller proteins to the T lymphocytes.

Detailed explanation-4: -Antibodies attach to a specific antigen and make it easier for the immune cells to destroy the antigen. T lymphocytes attack antigens directly and help control the immune response.