GENERAL HISTOLOGY

Detailed explanation-1: -The platelets then release chemicals called cytokines into your bloodstream. Cytokines attract the attention of certain cells to start healing your cut. They also alert your immune system to scan for infection in the injured area.

Detailed explanation-2: -Injured tissues release chemicals. In response, the body increases circulation to the injured area, bringing white blood cells and nutrients. The injured area and tissues surrounding it become swollen, warm and reddened. The inflammatory response limits function (because it causes more pain) to help the tissues heal.

Detailed explanation-3: -If an antigen enters the body and B-cells recognize it (either from having had the disease before or from being vaccinated against it), B-cells will produce antibodies. When antibodies attach to an antigen (think a lock–key configuration), it signals other parts of the immune system to attack and destroy the invaders.