Gastric hydrogen potassium ATPase, also known as H+/K+ ATPase, is an enzyme which functions to acidify the stomach.
Synovia, more often called synovial fluid, is a viscous, non-Newtonian fluid found in the cavities of synovial joints.
Breast milk is the milk produced by the breasts (or mammary glands) of a human female for her baby.
Colostrum (known colloquially as beestings, bisnings or first milk) is a form of milk produced by the mammary glands of mammals (including humans) in late pregnancy.
Pre-ejaculate (also known as pre-ejaculatory fluid, pre-seminal fluid, or Cowper's fluid, and colloquially as pre-cum) is the clear, colorless, viscous fluid that is emitted from the urethra of the penis during sexual arousal.
The amniotic fluid, commonly called a pregnant woman's water or waters (Latin liquor amnii), is the protective liquid contained by the amniotic sac of a pregnant female.
The aqueous humour is a transparent, watery fluid similar to plasma, but containing low protein concentrations.
Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.
Lymph is the fluid that circulates throughout the lymphatic system.
Perspiration, also known as sweating or diaphoresis, is the production of fluids secreted by the sweat glands in the skin of mammals.
Saliva is a watery substance formed in the mouths of humans and animals, secreted by the salivary glands.
Urine (from Latin urina, -ae, f.) is a liquid by-product of the body secreted by the kidneys through a process called urination (or micturition) and excreted through the urethra.
The vitreous body is the clear gel that fills the space between the lens and the retina of the eyeball of humans and other vertebrates.
Bile or gall is a dark green to yellowish brown fluid, produced by the liver of most vertebrates, that aids the digestion of lipids in the small intestine.
Cerebrospinal fluid (CSF) is a clear, colorless body fluid found in the brain and spine.
Earwax, also known as cerumen, is a yellowish waxy substance secreted in the ear canal of humans and other mammals.
In vertebrates, mucus (/mjuːkəs/ MYOO-kəss; adjectival form: "mucous") is a slippery secretion produced by, and covering, mucous membranes.
Tearing (/ˈtiərɪŋ/), lacrimation, or lachrymation, (from Latin lacrima, meaning "tear") is the secretion of tears, which often serves to clean and lubricate the eyes in response to an irritation of the eyes.
Chyme or chymus (/kaɪm/; from Greek χυμός khymos, "juice") is the semifluid mass of partly digested food that is expelled by the stomach, through the pyloric valve, into the duodenum (the beginning of the small intestine).
Chyle (/kaɪl/; from the Greek word χυλός chylos, "juice") is a milky bodily fluid consisting of lymph and emulsified fats, or free fatty acids (FFAs).
The amniotic sac, commonly called the bag of waters, sometimes the membranes, is the sac in which the fetus develops in amniotes.
Phlegm /ˈflɛm/ (Greek: φλέγμα "inflammation, humour caused by heat") is a liquid secreted by the mucous membranes of mammals.
Body fluid, bodily fluids or biofluids are liquids originating from inside the bodies of living people.
Endolymph is the fluid contained in the membranous labyrinth of the inner ear.
Perilymph (also known as Cotunnius' liquid, and liquor cotunnii) is an extracellular fluid located within the cochlea (part of the inner ear) in two of its three compartments: the scala tympani and scala vestibuli.
Simulated body fluid
A simulated body fluid (SBF) is a solution with an ion concentration close to that of human blood plasma, kept under mild conditions of pH and identical physiological temperature.
Cerebrospinal fluid rhinorrhoea
CSF rhinorrhoea refers to the drainage of cerebrospinal fluid through the nose.