While learning to ride a bicycle Boojho lost his balance and fell. He got bruises on his knees and it started bleeding. However, the bleeding stopped after some time. (a) Why did the bleeding stop? (b) What would be the colour of the wounded area and why? (c) Which type of blood cells is responsible for clotting of blood?
a) The bleeding stopped because of the formation of a blood clot, which plugged the wound to stop the flow of blood.
b) The wound area would be dark red to brownish in colour because of clot formation.
c) Platelets are responsible for clotting of blood.