excretion

excretion,

process of eliminating from an organism waste products of metabolism and other materials that are of no use. It is an essential process in all forms of life. In one-celled organisms wastes are discharged through the surface of the cell. The higher plants eliminate gases through the stomata, or pores, on the leaf surface. Multicellular animals have special excretory organs. In humans the main organs of excretion are the kidneys and accessory urinary organs, through which urine is eliminated (see urinary systemurinary system,
group of organs of the body concerned with excretion of urine, that is, water and the waste products of metabolism. In humans, the kidneys are two small organs situated near the vertebral column at the small of the back, the left lying somewhat higher than the
..... Click the link for more information. ), and the large intestinesintestine,
muscular hoselike portion of the gastrointestinal tract extending from the lower end of the stomach (pylorus) to the anal opening. In humans this fairly narrow (about 1 in./2.
..... Click the link for more information. , from which solid wastes are expelled. The skin and lungs also have excretory functions: The skin eliminates water and salt in sweatsweat
or perspiration,
fluid secreted by the sweat glands of mammalian skin and containing water, salts, and waste products of body metabolism such as urea. The dissolved solid content of sweat is only one eighth that of an equal volume of urine, the body's main
..... Click the link for more information. , and the lungs expel water vapor and carbon dioxide.

Excretion

the freeing of the organism from the end products of metabolism as well as from the foreign substances and excess water, salts, and organic compounds that have entered with food or were formed in the organism. As a result of metabolism, carbon dioxide, certain amino acids, urea, and other substances leave the cell and enter the inter-cellular fluid and then the blood. When excess salts or food substances are consumed or when metabolism is impaired, there is increased concentration of inorganic or organic substances in the blood (for example, glucose and amino acids). The organs of excretion have an important role in keeping constant the composition of the fluids of the internal environment (homeostasis). The process of excretion in vertebrates involves the kidneys, lungs or gills, glands of the gastrointestinal tract, skin, and sweat and salt glands (nasal, rectal). In invertebrates the process involves protonephridia, meta-nephridia, gills, and other organs; in protozoans the excretory organs are the contractile vacuoles. In some animals the products of metabolism and salts are deposited in accumulatory organs or integumentary tissues, which are discarded during molting. Excretion of carbon dioxide and other volatile substances occurs through the lungs or gills. Water, salts, and products of nitrogen metabolism (ammonia, urea, and uric acid) are mainly excreted by the kidneys. Sodium salts are excreted by seabirds and reptiles through the nasal glands and by fish through gills or the rectal gland. A human being weighing 70 kg and eating a normal diet discharges from 10,000 to 20,000 millimoles of carbon dioxide in a 24-hour period through the lungs, while nonvolatile mineral and organic acids and just 1-2 millimoles of bicarbonates are re-moved in the urine. The excretion of water is 1.2 liters in urine, 0.5 liter in sweat, and 0.1 liter in feces. The total quantity of nitrogen excreted in urine is 11 grams, in feces 1.7 grams, and in sweat 1 gram. In a 24-hour period the kidneys discharge 21 grams of urea, 0.63 grams of uric acid, 0.56 grams of hippuric acid, 1.05 grams of creatinine, and 0.78 grams of ammonia.

REFERENCES

Prosser, L., and F. Brown. Sravnitel’naia fiziologiia zhivotnykh. Moscow, 1967. (Translation from English.)

IU. V. NATOCHIN

excretion

[ek′skrē·shən] (physiology) The removal of unusable or excess material from a cell or a living organism.

excretion

[ek-skre´shun] 1. the act, process, or function of excreting. Ordinarily, what is meant by excretion is defecation, the evacuation of feces. Technically, excretion can refer to the expulsion of any matter, whether from a single cell or from the entire body, or to the matter excreted.2. waste material eliminated from the body, including feces, urine, and sweat. Mucus and carbon dioxide also can be considered excretions. The organs of excretion are the intestinal tract, kidneys, lungs, and skin. Called also excreta. adj., adj ex´cretory.

ex·cre·tion

(eks-krē'shŭn), 1. The process whereby the undigested residue of food and the waste products of metabolism are eliminated, material is removed to regulate the composition of body fluids and tissues, or substances are expelled to perform functions on an exterior surface. 2. The product of a tissue or organ that is material to be passed out of the body. Synonym(s): excreta Compare: secretion. [see excrement]

excretion

(ĭk-skrē′shən)n.1. The act or process of discharging waste matter from the blood, tissues, or organs.2. The matter, such as urine or sweat, that is so excreted.

excretion

The act or process of eliminating waste products from the body.

excretion

Therapeutics 1. The final elimination of a drug or other compound from the circulation–eg, via the kidneys in urine, biles into stool, saliva, sweat.2. A product that has been eliminated.

ex·cre·tion

(eks-krē'shŭn) 1. The process whereby the undigested residue of food and the waste products of metabolism are eliminated; material is removed to regulate the composition of body fluids and tissues, or substances are expelled to perform functions on an exterior surface. 2. The product of a tissue or organ that is material to be passed out of the body.
Synonym(s): excreta.
See: excrement
Compare: secretion

excretion

Removal from the body of the waste products of metabolism.

excretion

any elimination from an organism of unwanted materials, for example, carbon dioxide and nitrogenous substances produced in METABOLISM. It is worth noting that excretory materials must be produced by the organism rather than just pass through it; thus faeces in mammals contain a mixture of excreta (e.g. bile pigments) and undigested gut contents. Compare SECRETION.

Patient discussion about excretion

Q. what is the best thing to do to eliminate or to let it be remove without surgery?I'm afraid but laser mayb ok If I can go for laser where can you suggest coz I'm jobless and can't afford to pay.Or is there some remedy that i can take to melt those stones inside my bladder then they can come out through my waste ?A. Bladder stones, also called bladder calculi, often form when concentrated urine sits in your bladder. Bladder stones usually need to be removed. If the stone is small, your doctor may recommend that you drink an increased amount of water each day to help the stone pass. If the stone is large or doesn't pass on its own, your doctor may need to remove the stone. Bladder stones are usually removed during a procedure called a cystolitholapaxy. This is done by inserting a small tube with a camera at the end (cystoscope) through your urethra and into your bladder to view the stone. Your doctor uses a laser, ultrasound or mechanical device to break the stone into small pieces and then flushes the pieces from your bladder.
I am not familiar with the cost of such procedure.

Q. skins does excrete oil and keratin what exactly is the whitish cape up that you can squeeze out from underskin A. It sounds like you refer to sebum, an oily substance secreted by (how surprising :) ) sebaceus glands attached to the hair root. It's important for the skin, although abnormal secretion of it may cause diseases such as acne.
You may read more here:
http://en.wikipedia.org/wiki/Sebum#Sebum

Q. How much influence does diet pose when dealing with fibro? What actions have been found to reduce or eliminate A. Of course, you may read more here:
www.nlm.nih.gov/medlineplus/fibromyalgia.html
And if you have any questions you may consult your doctor.

More discussions about excretion

excretion

ex·cre·tion

ex•cre•tion

ex·cre·tion

excretion

excretion

excretion

excrete

excretion

excretion,

Excretion

REFERENCES

excretion

excretion

excretion

ex·cre·tion

excretion

excretion

excretion

ex·cre·tion

excretion

excretion

Patient discussion about excretion

excretion

Synonyms for excretion

noun the act or process of discharging bodily wastes or foreign substances

Synonyms

Synonyms for excretion

noun the bodily process of discharging waste matter

Synonyms

Related Words

noun waste matter (as urine or sweat but especially feces) discharged from the body

Synonyms

Related Words