Body fluids

thumb|upright=0.5|Sample of human urine

thumb|upright=1.15|Human tears Tears (tear film) are a transparent fluid secreted primarily by the lacrimal glands (tear gland) found in the eyes of all land mammals. According to the mode of production, tears are classified into four types: basal, closed eye, emotional, and reflex. The basal rate of tear secretion is ~0.5–2.2 μL/min, and irritation can increase secretion by up to ~100-fold, reaching ~300 μL/min. Tears are made up of water, electrolytes, proteins, lipids, and mucins that form layers on the surface of eyes. The four types of tears differ significantly in their composition. upr

thumb|right|287px|spermatozoon|Spermatozoa, in this case human, are a primary component of normal semen, and the agents of fertilization of female ova.

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).

thumb|Bile (yellow material) in a liver [[biopsy stained with hematoxylin-eosin in a condition called cholestasis (setting of bile stasi)]]

liquid component of blood

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

milk produced by the mammary glands in the breast of a human female

Lymph () is the fluid that flows through the lymphatic system, a system composed of lymph vessels (channels) and intervening lymph nodes whose function, like the venous system, is to return fluid from the tissues to be recirculated. At the origin of the fluid-return process, interstitial fluid—the fluid between the cells in all body tissues—enters the lymph capillaries. This lymphatic fluid is then transported via progressively larger lymphatic vessels through lymph nodes, where substances are removed by tissue lymphocytes and circulating lymphocytes are added to the fluid, before emptying ult

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

clear colorless bodily fluid found in the brain and spine

expulsion of fluid during or before an orgasm

digestive fluid formed in the stomach

thumb|Collection of hemolymph from a worker honeybee.

clear gel that fills the space between the lens and the retina of the eyeball

the fluid surrounding a fetus within the amnion

transparent, watery, fluid similar to plasma, but containing low protein concentrations, secreted from the ciliary epithelium

liquid originating from the inside of an organism, including fluids excreted or secreted, and body water that normally is not

An exudate is a fluid released by an organism through pores or a wound, a process known as exuding or exudation. Exudate is derived from exude 'to ooze' from Latin 'to (ooze out) sweat' ('''' 'out' and '''' 'to sweat').

liquid

the liquid outside of a cell

naturally produced fluid that lubricates a vagina

thumb|right|Rheum from a cat's eyes Rheum (; from Greek: ῥεῦμα rheuma 'a flowing, rheum') is a thin mucus naturally discharged from the eyes, nose, or mouth, often during sleep (contrast with mucopurulent discharge). Rheum dries and gathers as a crust in the corners of the eyes or the mouth, on the eyelids, or under the nose. It is formed by a combination of mucus (in the case of the eyes, consisting of mucin discharged from the cornea or the conjunctiva), nasal mucus, blood cells, skin cells, or dust.

thumb|A substance of phlegm Phlegm (; , phlégma, "inflammation", "humour caused by heat") is mucus produced by the respiratory system, excluding that produced by the throat and nose passages. It often refers to respiratory mucus expelled by coughing, otherwise known as sputum. Phlegm, and mucus as a whole, is in essence a water-based gel consisting of glycoproteins, immunoglobulins, lipids and other substances. Its composition varies depending on climate, genetics, and state of the immune system. Its color can vary from transparent to pale or dark yellow and green, from light to dark brown, an

bodily fluid

sac in which the fetus develops in amniotes

body fluid outside the cells of a multicellular organism

Chyme or chymus (; ) is the semi-fluid mass of partly digested food and digestive secretions that is formed in and expelled by the stomach, through the pyloric valve, into the duodenum (the beginning of the small intestine), where it is further transformed. Chyme also contains cells from the mouth and esophagus that slough off from the mechanical action of chewing and swallowing.

membrane-bound extracellular vesicles

Transudate is extravascular fluid with low protein content and a low specific gravity (< 1.012). It has low nucleated cell counts (less than 500 to 1000 per microliter) and the primary cell types are mononuclear cells: macrophages, lymphocytes and mesothelial cells. For instance, an ultrafiltrate of blood plasma is transudate. It results from increased fluid pressures or diminished colloid oncotic forces in the plasma.

Perilymph is an extracellular fluid located within the inner ear. It is found within the scala tympani and scala vestibuli of the cochlea. The ionic composition of perilymph is comparable to that of plasma and cerebrospinal fluid. The major cation in perilymph is sodium, with the values of sodium and potassium concentration in the perilymph being 138&nbsp;mM and 6.9&nbsp;mM, respectively. It is also named Cotunnius' liquid and liquor cotunnii for Domenico Cotugno.

Endolymph is the fluid contained in the membranous labyrinth of the inner ear. The major cation in endolymph is potassium, with the values of sodium and potassium concentration in the endolymph being 0.91&nbsp;mM and 154&nbsp;mM, respectively. It is also called ''Scarpa's fluid'', after Antonio Scarpa.

Chyle (; ) is a milky bodily fluid consisting of lymph and emulsified fats, or free fatty acids (FFAs). It is formed in the small intestine during digestion of fatty foods, and taken up by lymph vessels specifically known as lacteals. The lipids in the chyle are colloidally suspended in chylomicrons. Its principal role is to carry dietary fats and fat-soluble vitamins from the intestine into the venous circulation after digestion.

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.

Haemolacria or hemolacria is a physical condition that causes a person to produce tears that are partially composed of blood.

campaign to create the neologism "santorum" started in 2003 by LGBT rights activist Dan Savage

transparent or pale-colored body fluid resembling serum

class of transport proteins

heart

saliva particles involuntarily expelled from the mouth during speech

medical product

discharge of cerebrospinal fluid through the nose