1) Pulmonary Circulation:This is the process where deoxygenated blood is carried away from the right ventricle of the hearth while oxygenated blood is returned to the left ventricle and atrium of the heart.
2) Heart: It is a muscular organ that pump blood through the blood vessels of the circulatory system.
3) Systemic vain: this is a vain that drain into the right right atrium
4) Physical exertion:It the expenditure of energy expended during physical activity.
5) Vasoconstriction:It can be defined as the narrowing of the blood vessels which result into contraction of the muscular wall of the vessels most especially large arteries and small arterioles.
6) Vasodilation: This is when blood vessel is widening and result in relaxation of smooth muscle cell within the vessel walls.