Maximum blood pressure is experienced when blood enters from:

Complete the missing words in the statements given below:
$(a)$ Plasma without clotting factors is called serum.
$(b)$ $.........$ and monocytes are phagocytic cells.
$(c)$ Eosinophils are associated with $.........$ reactions.
$(d)$ $.........$ ions play a significant role in clotting.
$(e)$ One can determine the heart beat rate by counting the number of $.........$ in an $ECG$.

In a standard $ECG$,one of the following functions of its components is not correctly interpreted.

What are the systolic and diastolic blood pressures of a healthy adult human?

In a standard $ECG$,which one of the following alphabets is the correct representation of the respective activity of the human heart?

$ECG$ is a graphical representation of the electrical activity of the heart during