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The liver and kidneys clear many substances from the blood (for example, in renal excretion), and the cleared substances are then excreted from the body in the urine and feces. [6] Aquatic animals usually excrete ammonia directly into the external environment, as this compound has high solubility and there is ample water available for dilution.
Open defecation can pollute the environment and cause health problems. High levels of open defecation are linked to high child mortality, poor nutrition, poverty, and large disparities between rich and poor. [33]: 11 Ending open defecation is an indicator being used to measure progress towards the Sustainable Development Goal Number 6.
The dual function of excretory systems is the elimination of the waste products of metabolism and to drain the body of used up and broken down components in a liquid and gaseous state. In humans and other amniotes ( mammals , birds and reptiles ), most of these substances leave the body as urine and to some degree exhalation, mammals also expel ...
Human waste (or human excreta) refers to the waste products of the human digestive system, menses, and human metabolism including urine and feces.As part of a sanitation system that is in place, human waste is collected, transported, treated and disposed of or reused by one method or another, depending on the type of toilet being used, ability by the users to pay for services and other factors.
In humans, the anus (pl.: anuses or ani; from Latin ānus, "ring", "circle") [1] [2] is the external opening of the rectum located inside the intergluteal cleft.Two sphincters control the exit of feces from the body during an act of defecation, which is the primary function of the anus.
Rectal administration (colloquially known as boofing or plugging) uses the rectum as a route of administration for medication and other fluids, which are absorbed by the rectum's blood vessels, [Note 1] and flow into the body's circulatory system, which distributes the drug to the body's organs and bodily systems.
Human feces photographed in a toilet, shortly after defecation.. Human feces (American English) or faeces (British English), commonly and in medical literature more often called stool, [1] are the solid or semisolid remains of food that could not be digested or absorbed in the small intestine of humans, but has been further broken down by bacteria in the large intestine.
The water and stool may take some time to fully evacuate, especially with patients with obstructed defecation. People with reduced muscular strength of the anal sphincter may encounter problems with later leakage of the water mixed with stool, which may bring similar, socially devastating problems as seen with fecal incontinence.