Drinking waterWater safe for consumptionDrinking water that is supplied through a tap (tap water)Drinking water or potable water is water that is safe for ingestion, either when drunk directly in liquid form or consumed indirectly through food preparation. It is often supplied through taps, in which case it is also called tap water.
SwallowingSwallowing, also called deglutition or inglutition in scientific and medical contexts, is a physical process of an animal's digestive tract (e.g. that of a human body) that allows for an ingested substance (typically food) to pass from the mouth to the pharynx and then into the esophagus. In colloquial English, the term "swallowing" is also used to describe the action of gulping, i.e. taking in a large mouthful of food without any biting.
LiquidState of matter The formation of a spherical droplet of liquid water minimizes the surface area, which is the natural result of surface tension in liquids.PeristalsisPeristalsis ( , US also ) is a type of gut motility, characterized by radially symmetrical contraction and relaxation of muscles that propagate in a wave down a tube, in an direction. Peristalsis is progression of coordinated contraction of involuntary circular muscles, which is preceded by a simultaneous contraction of the longitudinal muscle and relaxation of the circular muscle in the lining of the gut.
WaterNames Preferred IUPAC nameWaterSystematic IUPAC nameOxidane (not in common use)Other names Hydrogen oxideHydrogen hydroxide (H2O or HOH)Hydroxylic acidDihydrogen monoxide (DHMO) (parody name)Dihydrogen oxideHydric acidHydrohydroxic acidHydroxic acidHydroxoic acidHydrolμ-Oxidodihydrogenκ-Hydroxylhydrogen(0)AquaNeutral liquidOxygen dihydride (may be considered incorrect)Identifiers CAS Number7732-18-53D model (JSmol)Interactive imageBeilstein Reference3587155 ChEBICHEBI:15377ChEMBLChEMBL1098659ChemSpider937DrugBankDB09145ECHA InfoCard100.028.902EC Number231-791-2Gmelin Reference117 KEGGC00001PubChemCID962RTECS numberZC0110000UNII059QF0KO0RCompTox Dashboard(EPA)DTXSID6026296InChIInChI=1S/H2O/h1H2Key: XLYOFNOQVPJJNP-UHFFFAOYSA-NSMILESOProperties Chemical formulaH2OMolar mass18.015 g·mol Appearance Almost colorless or white crystalline solid, almost colorless liquid, with a hint of blue, colorless gas OdorOdorless DensityLiquid (1 atm, VSMOW):0.99984283(84) g/mL at 0 °C0.99997495(84) g/mL at 3.983035(670) °C (temperature of maximum density, often 4 °C)0.99704702(83) g/mL at 25 °C0.96188791(96) g/mL at 95 °CSolid:0.9167 g/mL at 0 °CMelting point0.00 °C (32.00 °F; 273.15 K) Boiling point99.98 °C (211.96 °F; 373.13 K) SolubilityPoorly soluble in haloalkanes, aliphatic and aromatic hydrocarbons, ethers.
MouthA mouth, also referred to as the oral, is the body orifice through which many animals ingest food and vocalize. The body cavity immediately behind the mouth opening, known as the oral cavity (or cavum oris in Latin), is also the first part of the alimentary canal, which leads to the pharynx and the gullet.
EsophagusVertebrate organ through which food passes to the stomachUpper and lower human gastrointestinal tractThe esophagus (American English) or oesophagus (British English) ( ), also known as the gullet, is an organ in vertebrates through which food passes, aided by peristaltic contractions, from the pharynx to the stomach.IngestionIngestion is the consumption of a substance by an organism. In animals, it normally is accomplished by taking in a substance through the mouth into the gastrointestinal tract, such as through eating or drinking. In single-celled organisms, ingestion takes place by absorbing a substance through the cell membrane.Tissue hydrationTissue hydration is the process of absorbing and retaining water in biological tissues.
PhysiologyPhysiology (; from Ancient Greek (phúsis)'nature, origin' and (-logía)'study of') is the scientific study of functions and mechanisms in a living system. As a subdiscipline of biology, physiology focuses on how organisms, organ systems, individual organs, cells, and biomolecules carry out chemical and physical functions in a living system.
ProboscisA proboscis () is an elongated appendage from the head of an animal, either a vertebrate or an invertebrate. In invertebrates, the term usually refers to tubular mouthparts used for feeding and sucking. In vertebrates, a proboscis is an elongated nose or snout.
AnimalBiological kingdomAnimals are multicellular, eukaryoticorganisms belonging to the biologicalkingdomAnimalia (). Animals consume organic material, breathe oxygen, have muscle cells, can reproduce sexually, and grow from a hollow sphere of cells, the blastula, during embryonic development. With few exceptions, animals are able to move. Animals form a clade, meaning that they arose from a single common ancestor.*As an Amazon Associate I earn from qualifying purchases.