In this article we will discuss about the changes which occurs in cardiovascular system during exercise. I. Heart and Exercise: Prolonged and systematic exercise causes enlargement of the heart, and this is happens only to cope with the excessive work load imposed upon the heart during work. There is a lot of misunderstanding that prolonged exercise may cause dilatation of [...]
Circulation in a particular region or organ is directly proportional to the degree of local activity. It is adjusted on two lines: (1) By regulating the general circulation, and (2) By adjusting the local blood vessels. Generally, vasodilatation of an active part is accompanied with vasoconstriction of other inactive parts. In this way, blood is shifted from the inactive to [...]
Anatomy of Circulation: Blood enters lungs through two sources; pulmonary artery and bronchial arteries. The cross-sectional area of the pulmonary artery is same as that of the aorta, but it is more elastic and distensible. Through the pulmonary artery venous blood of the right ventricle goes to the lungs for oxygenation. It also carries nutrition to the pulmonary tissues. Bronchial [...]