Excrement

The excrements are all the matters evacuated naturally by an animal organization, in solid form or liquid: Feces, Urine, Sweat, etc the physiological process of the excretion has as a function to evacuate the not digested or undesirable substances of the Intestin S and the interior medium, and take part in the maintenance of the internal conditions.

The rejection in the external environment is an important component of the ecological cycles .

The need for evacuating the excrements, often harmful, of the immediate environment, the chemical signature that they constitute for the species or the individual involved the appearance of more or less complex behaviors in the vertebrate superiors and in particular the mammals. Complex social strategies also developed at certain species living in many and ressérées colonies. At the man the fecal inventory management is posed as of the appearance of the urban life, i.e. of gathered settlement. A fecal excrement follows a long way to finish " éjecté" by the anus: first of all one absorbs the food which is softened and reduced out of pulp by the teeth and saliva, after which, it passes in the stomach which contributes to dissolution while pouring on its contents of the gastric juice, food is less recognizable, but is always, the food, then begin long way in the small intestine, where the bile (coming from the liver) and pancreatic juice flow (as its name indicates it, it comes from the pancreas) then, the food is not recognizable any more whole: they are called the nutrients. It is at this time that the vitamins, proteins, lipids etc… are absorbed by the blood capillaries connected to the wall of the small intestine. The excrements, useless, continue their way in the small intestine, arrive in the large intestine, then are rejected, finally, by the anus after being stored in the rectum.

See too

  • Déféquer
  • Épreinte

External bond

Four thousand years of durable agriculture, bio current events (10/04) by Alfred Berner, specialist in the composts, a study of the agricultural system of old China, which practiced during 4000 years an intense recycling of the human excrements.

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