The cardio-vascular system comprises of organs of the body concerned with the manufacture, storage and circulation of the blood, namely, the liver, the heart and the arteries. Blood is the most vital fluid in the body and any reduction in its quantity or interruption in, its supply or lack of balance among its constituents, as in anemia, gives rise to many diseases, some of which may prove fatal in the long run.
The human body receives its nutrition from the food which is digested in the stomach and turned into blood. Blood courses through the body and restores the tissues and replaces the energy which we lose while we use our body. It is being constantly manufactured, purified and replaced.
The heart pumps the blood into the various organs from which it returns to the heart and from there goes to the lungs for oxygenation to be reused. The blood, it should be noted, makes a complete circuit of the body in 15 seconds flat.
Its constituents-the red and the white corpuscles and, of course, the plateletshave their own functions to perform. The lack of the red blood corpuscles leads to anaemia since the allotted function of the RBCs (red blood corpuscles) is to carry oxygen. The WBCs (white blood corpuscles) are the soldiers provided by nature to fight infection. The platelets help in coagulation of the blood in case of injury-people whose blood is dificient in platelets ate always in danger of dying of haemorrhage, because once bleeding starts it will not stop since the blood will refuse to coagulate. The fluid part of the blood (plasma) is the carrier of salts and proteins which nourish the tissues. In its journey from the pump that nature has provided (the heart) to the various parts of the body, blood carries the various waste products like carbonic acid gas (exhaled from the lungs), urea and poisons ejected by the kidneys through the urine. Blood is a general medium of communication between the organs which are chemically interdependent: it carries to the stomach the materials for the gastric juice, to the muscles the ferments formed in the pancreas and absorbs secretions needed for the general purposes of the body, like those of the thyroid and the suprarenal glands.
Liver and Its Disorders
The liver is the largest gland in the body and one of the five major organs which are vital to life. A malfunctioning of the liver may not become apparent immediately, unless of course, the flow of blood through it is impeded or the bile ducts are dosed. It has an innate vitality of its own and if it becomes disordered it fights off the disease on its own. But once it becomes diseased, it takes a long time to go back to normal. The liver is a chemical factory which produces heat by its own chemical processes. It secretes biles (salts and pigments) and is vital to the assimilation of fats in the body. It is also a storehouse of the substances necessary for the proper functioning of the bone marrow which plays an important part in the manufacture of red blood corpuscles. It also manufactures the fibrinogen of the blood, stores iron and copper, produces peparin, detoxicates the noxious products made in the intestines and absorbed into the blood. Glycogens (carbohydrates processed by the body) are also stored in the liver.