United States or Malta ? Vote for the TOP Country of the Week !
From this tissue activity, which is mainly oxidation, are formed certain waste products which, as we have seen, are absorbed by the capillaries and lymphatics and carried into the venous circulation. In their passage through the blood and tissues, the albumens, sugars, starches, and fats are converted into carbon dioxid, water, and urea, or some closely allied body.
This may be due to the blood in the portal vessels and the liver capillaries, charged with nutritious and waste products from the overfed animal's intestines, being suddenly thrown into the general circulation by a more active circulation of the blood brought on by exercise. The symptoms of disease are manifested shortly after the animal is moved out of the stall and given exercise.
The skin becomes red, and the perspiration great, owing to the increased action of the capillaries during the hot part of the paroxysm.
These morbid encumbrances clog the capillaries, thus obstructing the circulation and interfering with or preventing the normal activity of the organs of elimination, especially the skin.
In this way they cause the intermittent flow from, the heart to become a steady stream in the capillaries. The swelling of the arteries at each contraction of the ventricle is easily felt at certain places in the body, such as the wrist. This expansion, known as the "pulse," is the chief means employed by the physician in determining the force and rapidity of the heart’s action.
The pulmonary artery, bringing venous blood, by its alternate expansion and recoil, draws the blood along until it reaches the pulmonary capillaries. These tiny tubes surround the air cells of the lungs, and here an exchange takes place. The impure, venous blood here gives up its débris in the shape of carbon dioxid and water, and in return takes up a large amount of oxygen.
The changes in the circulation occurring in inflammation are as follows: An increase in the rate of the blood-flow through the blood-vessels of the part and their dilation; diminished velocity followed by the blood-flow becoming entirely suspended; following the retardation or suspension of the blood stream, white blood-corpuscles accumulate along the walls of the small veins and capillaries; white and red blood-corpuscles migrate from the vessels into the neighboring tissue, and blood-serum transudes through the walls of the vessels, forming the inflammatory swellings.
Many of the physiological researches begun by him were carried on and perfected by his more famous brother, particularly his investigations of the capillaries, but he added much to the anatomical knowledge of several structures of the body, notably as to the structure of cartilages and joints.
How do the waste materials get from the cells to the organs of excretion? Show by a drawing the connections of the kidneys with the large blood vessels and the bladder. Name parts of drawing. In what do the uriniferous tubes have their beginning? In what do they terminate? With what are they lined? Why should the blood pass through two sets of capillaries in the kidneys?
Attempts have been made to improve the peripheral circulation by establishing an anastomosis between the main artery of a limb and its companion vein, so that arterial blood may reach the peripheral capillaries reversal of the circulation but the clinical results have proved disappointing. Treatment.
Word Of The Day