Question

Given is a diagram of a human blood smear. Study the diagram and answer the question that follows.
Name the components numbered 1 to 4.

Answer 1

• The given diagram shows the microscopic view of a human blood smear:-
  

1. RBCs or Red blood cells are oval biconcave disc-shaped cells. It contains haemoglobin protein (iron-containing pigment) which helps in carrying oxygen.
2. WBCs or White blood cells (neutrophils) are also known as leukocytes. It helps to fight infections by attacking different microbes that enter the body. The most common WBCs in blood is neutrophils which have a multilobed nucleus.
   
3. Platelets or thrombocytes are biconvex discoid structures in the blood whose main function is to prevent bleeding by initiating blood clotting (with other coagulating factors).
   
4. Blood plasma is a pale yellow liquid which consists of all the blood cells along with salts and enzymes.