What is the value of diastolic blood pressure?

Draw a standard $ECG$ and explain the different segments in it.

If repeated checking of blood pressure of an individual shows systolic $140$ $mm$ $Hg$ and diastolic $90$ $mm$ $Hg$ or higher,it indicates hypertension.

Which one indicates hypertension or high blood pressure $(BP)$?

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 $ECG$.

What is blood pressure?