Excretion

Perspiration, also known as sweat, is the fluid secreted by sweat glands in the skin of mammals.

thumb|Saliva on a baby's lips Saliva (commonly referred to as spit, drool or slobber) is an extracellular fluid produced and secreted by salivary glands in the mouth. In humans, saliva is around 99% water, plus electrolytes, mucus, white blood cells, epithelial cells (from which DNA can be extracted), enzymes (such as lingual lipase and amylase), and antimicrobial agents (such as secretory IgA, and lysozymes).

Urea, also called carbamide (because it is a diamide of carbonic acid), is an organic compound with chemical formula . This amide has two amino groups (−) joined by a carbonyl functional group (−C(=O)−). It is thus the simplest amide of carbamic acid.

Pus is an exudate, typically white-yellow, yellow, or yellow-brown, formed at the site of inflammation during infections, regardless of cause.

Urination is the release of urine from the bladder through the urethra in placental mammals, or through the cloaca in other vertebrates. It is the urinary system's form of excretion. It is also known medically as micturition, voiding, uresis, or, rarely, emiction, and known colloquially by various names including peeing, weeing, pissing, and euphemistically number one. The process of urination is under voluntary control in healthy humans and other animals, but may occur as a reflex in infants, some elderly individuals, and those with neurological injury. It is normal for adult humans to urinat

thumb|Mucous cells of the stomach lining secrete mucus (pink) into the lumen

movement of oxygen from the outside air to the cells within tissues, and the transport of carbon dioxide in the opposite direction

thumb|Mammals excrete urine through the urinary system. Excretion is elimination of metabolic waste, which is an essential process in all organisms. In vertebrates, this is primarily carried out by the lungs, kidneys, and skin. This is in contrast with secretion, where the substance may have specific tasks after leaving the cell. For example, placental mammals expel urine from the bladder through the urethra, which is part of the excretory system. Unicellular organisms discharge waste products directly through the surface of the cell. Another example would be how mammals release solid waste (f

alt=European bee-eater defecating|thumb|European bee-eater defecating right|frame|Human anatomy of the anorecturm (anus and [[rectum)]]

Smegma (from Ancient Greek ) is a cheesy substance composed of shed skin cells, skin oils, and moisture that occurs in male and female mammalian genitalia. In males, smegma collects under the foreskin; in females, it collects around the clitoris and in the folds of the labia minora.

thumb|A cartoon of Charlie Chaplin spitting on the ground (1931, by [[Hinko Smrekar)]] thumb|"Don't spit" prevention poster

In obstetrics, lochia is the vaginal discharge after giving birth, containing blood, mucus, and uterine tissue. Lochia discharge typically continues for four to eight weeks after childbirth, a time known as the postpartum period or puerperium. A 2016 review ties this "lochial period" to worldwide customs of postpartum confinement, a time for the new mother and baby to bond.

waste materials emitted by evacuation from animal organisms

Hypohidrosis is a medical condition in which a person exhibits diminished sweating in response to appropriate stimuli. In contrast with hyperhidrosis, which is a socially troubling yet often harmless condition, the consequences of untreated hypohidrosis include hyperthermia, heat stroke and death. An extreme case of hypohidrosis in which there is a complete absence of sweating and the skin is dry is termed anhidrosis. The condition is also known as adiaphoresis, ischidrosis, oligidria, oligohidrosis and sweating deficiency.

rules in Islam when going to the toilet

thumb|Coconut flower Hainuwele, "The Coconut Girl", is a figure from the Wemale and Alune folklore of the island of Seram in the Maluku Islands, Indonesia. Her story is an origin myth.

part of the mucus membrane lining the nasal cavity

human bodily waste which is excreted from the body, such as feces and urine

any one of a number of processes by which a drug is eliminated (that is, cleared and excreted) from an organism either in an unaltered form (unbound molecules) or modified as a metabolite

Jewish blessing

Coprophobia is fear of or aversion to feces or defecation.

safe, beneficial use of animal or human excreta

saliva particles involuntarily expelled from the mouth during speech