Question

What would be the colour of the wounded area and why?

Answer 1

Hint: Our body is covered by the skin. Any injury or trauma in the epidermis of the skin causes the cut or tear. This is known as a wound. The tear in the epidermis leads to bleeding.

Complete answer:
Our body is covered with skin. Any cut or injury in the skin leads to bleeding. The bleeding stops after sometimes. It takes place by the process of coagulation. Our blood has specialised cells called platelets which help in the coagulation of the blood.

Coagulation is the process by which the blood changes into solid and semi-solid states. When the injury takes place, the blood vessels shrink so that blood doesn’t leak. The blood cells called the platelets stick around the wound and form a patch at the site of injury. The proteins and the platelets form the fibrin clot. It acts as a mesh and prevents bleeding.

The colour of the wound is bright red due to the granulation of the blood. Granulation tissue is the grain-like tissue that forms in the area of the wound so that healing can take place. As the wound starts healing, the colour changes to light pink which shows the formation of new blood vessels at the injury site.

Note: The other two colours of the wound can be black or yellow. Black signifies necrosis whereas yellow suggests microbial infection. In case of microbial infection, pus or cloudy fluid oozes out from the wound. If the wound is not granulating properly then it will show a dark red colour.