120 mm Hg is the systolic BP, i.e., during ventricular contraction. 80 mm Hg is the diastolic BP, i.e., during ventricular relaxation. In a 25-year-old person systolic pressure ranges from 110/130 mm Hg and diastolic from 70/90 mm Hg.

All veins carry deoxygenated blood except pulmonary veins which bring oxygenated blood from lungs to left auricle.

During ventricular contraction, blood is pumped into the aorta, the main arterial trunk, from where it is carried to various parts of the body.

It is a mercury manometer.

 Hemoglobin is 14-16 gms%.

Platelets are formed by fragmentation of megakaryocytes; therefore, they do not contain any nucleus.

Pulmonary trunk divides into right and left pulmonary arteries which carry deoxygenated blood to the lungs.

Right ventricle pumps deoxygenated blood to lungs through pulmonary arteries. In the lungs, it gets oxygenated and is sent back to left auricle through pulmonary veins.

During fever, anxiety and exercise, metabolic rate of the body increases. This results in increased oxygen demand, which in turn causes increase in heart rate.

Contraction of ventricles is known as systole. It results in ejection of blood out of the ventricles.
Diastole is the relaxation of ventricles. It results in filling of the ventricles with the blood.

Hemophilia is caused due to deficiency of a clotting factor. Bleeding time i.e. the time required for bleeding to stop when a puncture is made into the skin, remains unchanged. Clotting time is prolonged.