Question

The average diameter of red blood corpuscles in man is
A) 7.2µm
B) 8.1 µm
C) 9.2 µm
D) 10.3 µm

Answer 1

Hint:RBC is also known as erythrocytes.These are the most common blood cell in vertebrates which carries oxygen to all parts of the body.

Complete answer:
In humans, the blood acts as fluid connective tissue. Blood is made up of plasma and the cellular components. The cellular components are the RBC, WBC, Platelets. WBCs are responsible for carrying the defence mechanism and protecting our body against antigens or foreign particles. Platelets are responsible for blood clotting. RBC plays a major role in transport of oxygen to all the organs and tissues.
Structure of RBC- Mature RBC is flexible and biconcave disc like. They are anucleated and lack most of the organelles. The cell membrane is lipo-proteinous in nature which provides structural stability to the cells. The cytoplasm contains an iron containing molecule called the haemoglobin. The haemoglobin is responsible for the red colour of the cell and also binds with oxygen for its transport. The RBCS are produced in the bone marrow and have an average life span of 120 days. The average diameter of RBC is 7.2 µm.

Thus the correct answer is (A). The average diameter of RBC is 7.1 µm

Note:Anisocytosis is a condition in the RBCs that is not even size. The abnormal size of RBC is helpful in diagnosing diseases like anemia. This results in decrease of oxygen delivery to the tissues.The blood which is stored in the blood bank for blood transfusion is packed with red blood cells.