Advertisements
Advertisements
Question
While learning to ride a bicycle Boojho lost his balance and fell. He got bruises on his knees and they 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 are responsible for clotting of blood?
Solution
(a) Bleeding stops due to coagulation/ clotting of blood.
(b) The colour of the wounded area would initially be dark red due to the clotting of blood.
(c) Platelets are responsible for the clotting of blood.
APPEARS IN
RELATED QUESTIONS
What makes the blood look red?
A patient with blood group O was injured in an accident and has blood loss. Which group of blood should be used by the doctor for transfusion?
Who discovered the Rh factor? Why was it named so?
Direction: In each of the following questions a statement of assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Mark the correct statement as.
Assertion: RBC plays an important role in the transport of respiratory gases.
Reason: RBC does not have cell organelles and a nucleus.
Direction: In each of the following questions a statement of assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Mark the correct statement as.
Assertion: Persons with AB blood group are called a universal recipient because they can receive blood from all groups.
Reason: Antibodies are absent in persons with AB blood group.
Crab has blue blood.
Blood is a fluid connective tissue.
Veins have valves that allow blood to flow only in one direction. Arteries do not have valves. Yet the blood flows in one direction only. Can you explain why?
When a red blood corpuscle containing both A and B antigens are mixed with your blood serum, they agglutinate. Hence your blood group is ______.
Define the following term:
Blood
