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excretion

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blood

blood  

(blud)a fluid that circulates throughout the body, via the arteries and veins, providing a vehicle by which an immense variety of different substances are transported between the various organs and ...
drinking

drinking  

Taking in water by mouth to quench thirst. Many aquatic animals take water in through the mouth, but this may play no role in homeostasis. True drinking applies to terrestrial animals that take in ...
egestion

egestion  

The expulsion from the body of waste food materials that have never left the gut, particularly the expulsion of undigested materials from the gut through the anus (see defecation). Egestion should ...
excretion

excretion   Reference library

The Oxford Companion to the Body

Reference type:
Subject Reference
Current Version:
2003
Subject:
Science and technology, Life Sciences
Length:
661 words

is the transfer of substances out of a living organism into its environment. At its simplest, for single-cell forms of

excretion

excretion   Quick reference

World Encyclopedia

Reference type:
Subject Reference
Current Version:
2004
Subject:
Encyclopedias
Length:
53 words

Elimination of materials from the body that have been involved in metabolism. In mammals, these wastes excrete mainly as

excretion

excretion   Quick reference

The Oxford Dictionary of Sports Science & Medicine (3 ed.)

Reference type:
Subject Reference
Current Version:
2007

The elimination of metabolic wastes (including carbon dioxide and urea) from the body.

homeostasis

homeostasis  

Reference type:
Overview Page
n. the physiological process by which the internal systems of the body (e.g. blood pressure, body temperature, acid-base balance) are maintained at equilibrium, despite variations in the external ...
human body

human body  

Reference type:
Overview Page
Physical structure of a human. It consists of water, protein and other organic compounds, and some minerals. The skeleton consists of more than 200 bones, sheathed in voluntary muscle to ...
kidney

kidney  

Reference type:
Overview Page
An organ that may have arisen in freshwater animals for the purpose of voiding excess water and that is concerned in modern forms with excretion and/or the retention of water.
secretion

secretion  

1 The act of discharging useful materials (i.e. as opposed to the excretion of waste products) from cells.2 Any such material discharged from cells.
urinary system

urinary system  

The collection of organs and tissues that perform osmoregulation and excretion. The mammalian urinary system consists of two kidneys each linked to the bladder by a ureter.
waste product

waste product  

Any product of metabolism that is not required for further metabolic processes and is therefore excreted from the body. Common products include nitrogenous wastes (such as urea and ammonia), carbon ...

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