The function of valves present in auricles and ventricles is-

Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong:

Choose the correct answer from the four options given below:

Agranulocytes are:

Choose the correct answer from each of the four options given below:

A muscular wall is absent in:

Give appropriate biological or technical terms for the following:

The relaxation phase of the heart.

Name the following:

The smallest blood vessels with one cell thick walls.

Draw the diagram showing the sectional view of the human heart. Label the following parts.

(i) Aorta

(ii) Chamber of the heart that receives deoxygenated blood.

Write any five differences between artery and vein.