Tuesday, May 22, 2012

Other organs in Excretion

ROLE OF LIVER IN EXCRETION
The liver is a vital part of the excretory system, and the human body. It regulates glycogen storage, plasma protein synthesis, and drug detoxification. The liver secretes bile, a base used for breaking down fats. Therefore, it helps get rid of unneeded wastes in the body. It changes toxic ammonia, which is a poisonous gas , to urea, a harmless fluid. The kidney filters urea(a mix of sugar and waste) into a liquid called urine. The liver is the largest gland in the body.



ROLE OF LUNGS IN EXCRETION
Lungs are two-sponge like organs localized in each side of the thorax. They are constituted by pulmonary alveoli. They are not responsible for converting oxygen into carbon dioxide, but to maintain life supporting levels of these two gases in blood stream by excreting the extra carbon dioxide and keeping a regular supply of oxygen. Each and all organism's cells can take the oxygen through passive diffusion from the bloodstream and use it in its own metabolism, thus producing carbon dioxide that will be further excreted when passing through alveoli circulation.



ROLE OF SKIN IN EXCRETION
The skin is another part of the system, containing sweat that help regulate the concentration in one’s body while also keeping him or her cool. The salt helps evaporate the water, cooling off the skin. Sweat is excreted through sweat glands. There are two types of sweat glands: Eccrine sweat glands and Apocrine sweat glands. The basic purpose of skin is to provide a waterproof, protective, covering for the body's complex internal environment. The skin also plays a key role in helping to maintain the circulatory and nervous system.
ROLE OF ECCRINE GLANDS IN EXCRETION
The eccrine glands secrete mostly water and salt and are used by the body for temperature control. These glands are located all around the body but are most profuse around the soles of the feet, palms of the hands, and the forehead. They look like coiled tubes, spiraling towards the exterior of the skin
ROLE OF BILE IN EXCRETION
Bile is a greenish or yellowish substance secreted by the liver used for breaking down fats, ethanol, and acidic wastes. It is composed of water, cholesterol, lechithin, bicarbonate ions, bile salts, and pigments. Bile is a strong basic substance, classified as alkaline. It is released through bile ducts in the liver. A digestive chemical that is produce in the liver, stored in the gall bladder, and secreted in the small intestine

ROLE OF LARGE INTESTINE IN EXCRETION
The large intestine, or the colon, is the last part of the excretory system. It is the organ that removes solid waste from the body. Its function is not only to remove solid waste but to collect water from the waste that can be reused. It is part of the alimentary canal, a channel that flows through vertebrate animals. It is about 6 to 7 meters long and processes, transports, and excretes solid wastes.

No comments:

Post a Comment