Question

Describe the various defence mechanism which are set off when you cut yourself with a dirty knife

Answer 1

As soon as the dirty knife cuts into the cells of your skin, your body springs into action. First,

blood cells called platelets join together at the cut and form a clot to stop the bleeding and prevent the entry of antigens in the body .

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.As the germs from the dirty knife begin to attack your body,

several immune cells called macrophages (monocytes), B-cells come to help fight them off. Which includes damaged cells or bacteria that can cause infection.

The B-cells kill pathogens, killed pathogens and destroyed B-cells are then engulfed by macrophages (monocytes)