These do not contain granules in them. Hence, they are placed under the category of agranulocytes.

Concave surfaces do increase the surface areas of RBCs.

Bilirubin accumulates in the blood plasma providing yellowish tint to the skin resulting in jaundice.

It is the pacemaker of the heart as it sets the rhythm of the heart.

These are the two large veins, which carry deoxygenated blood to the right atrium.

In this, beta chain of globin molecule is altered due to replacement of single amino acid that results in sickling of  RBCs thus, making them defective.

These do not help in blood clotting.

During the development of erythrocytes, mitochondria and nucleus are lost to give extra space for the storage of hemoglobin.

This is the correct sequence.

It has a thicker myocardium than the right ventricle or both the atriums as it has to push oxygenated blood to longer distances to all the body parts and also through more blood vessels.

Due to deposition of plaques in the lumen of the arteries, their diameters become narrow. This obstructs the blood flow to that part of the heart leading to a heart attack or myocardial infarction.

Stroke volume is the volume of the blood ejected by each ventricle at each contraction whereas the pulse rate is the number of heart beats per minute.

It results from lack of oxygen due to a hole between the right and left sides of the heart. This condition is also called as blue baby syndrome.

It is a process in which WBCs squeeze themselves through the capillaries and reach the site of wound.

Its affinity is about 200 times greater than oxygen for the iron of hemoglobin.