mouth
Enable an agent to recognise an animal mouth, record its anatomical and functional state, and judge which observations or interactions are appropriate for the organism concerned.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex + Grok
Purpose and description
Enable an agent to recognise an animal mouth, record its anatomical and functional state, and judge which observations or interactions are appropriate for the organism concerned.
The mouth is the cranial orifice of the alimentary canal together with the cavity immediately inside it, through which food is ingested and typically seized, tasted and mechanically processed, and which in vertebrates communicates posteriorly with the pharynx.
It can be Identify and label the oral opening and visible associated structures using taxon-appropriate terminology.; Record mouth opening and movement with explicit landmarks, posture, and observation conditions.; Describe visible oral changes and compare observations of the same location over time.; Assess evidence for food acquisition, retention, processing, and transfer without inferring unobserved performance.; Relate oral structures to observed sensory or communicative functions where applicable.; Determine whether further oral examination requires consent, trained handling, or specialist assessment..
Distinguishing features
Identify an anatomical opening associated with food entry into an animal; do not classify an opening as a mouth solely because it admits air.
Distinguish the oral aperture from the associated oral cavity, recording which meaning an observation uses.
Treat lips, jaws, teeth, and tongue as associated structures where present, rather than requiring all of them for mouth identity.
Locate the mouth relative to adjoining digestive passages using the organism's anatomy rather than assuming human boundaries.
Distinguish a mouth belonging to an individual from a diagram, prosthesis, or taxon-level description of mouth anatomy.
Scope
+ The oral opening, associated cavity where present, and boundaries with adjacent structures
+ Arrangement and relationships of oral tissues and structures
+ Mouth participation in food intake and initial processing
+ Oral sensation and participation in communication or other taxon-specific functions
+ Observed oral condition, functional limitations, and constraints on examination
- The organism's complete anatomy, taxonomy, or life history
- Standalone models of teeth, tongue, jaws, and salivary glands
- Downstream digestion and the complete respiratory system
- Disease-specific diagnosis and treatment protocols
- Language, speech content, and communicative intent
- Figurative mouths such as river mouths or container openings
Characteristics
- Organism and anatomical reference
- Individual organism, taxon, life stage, and applicable anatomical terminology Determines which structures and functions can reasonably be expected.
- Referent extent
- Oral aperture; oral cavity; combined oral region; unresolved Prevents observations about an opening from being mistaken for observations about the whole oral region.
- Oral structure complement
- Present and absent structures, with their positions and connections Supports recognition without imposing teeth, lips, or jaws on every animal.
- Opening extent
- Millimetres between named landmarks or degrees between named structures, with posture and method Makes opening capacity interpretable and comparable within an appropriate anatomical context.
- Closure and movement
- Observed closure, movement range, symmetry, and limitations; not assessed Records whether the mouth can perform movements relevant to its usual functions.
- Intake performance
- Observed acquisition, retention, processing, and transfer of food; difficulty; not assessed Separates mouth appearance from demonstrated function.
- Surface condition
- Location-specific observations of surface integrity, moisture, colour, swelling, bleeding, or material present Allows changes to be tracked without treating an observation as a diagnosis.
- Sensory evidence
- Reported sensation; observed response; measured response; unknown Distinguishes subjective reports from behavioural or instrument-based evidence.
- Functional connections
- Connections to digestive, respiratory, sensory, or sound-producing structures, where applicable Clarifies which wider functions involve this mouth and which require neighbouring models.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.mouth-person
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 18 findings · 28 questions.
Oral identity and boundaries Establishes what anatomical region the word mouth denotes for this organism.
Mouth can name an aperture or a larger oral region, and its anatomy varies across animals.
Organism and reference
Anchors mouth identity to an individual and an anatomical reference.
Anatomical context
Record the organism, life stage, and reference supporting identification of its mouth.
- To which organism and life stage does this mouth belong? definition
- Which anatomical reference supports identifying this structure as the mouth? provenance
Aperture and cavity
Separates the external opening from any associated internal oral space.
Oral region limits
Declare the included region and its transitions into neighbouring structures.
- Does this record describe the oral opening, an oral cavity, or both? boundary
- Which landmarks mark its external margins and transition into the next digestive region? boundary
Oral structures and motion Describes the structures forming the mouth and how they open, close, and move.
Structural arrangement and movement constrain what this mouth can admit, retain, or manipulate.
Structural arrangement
Maps oral margins, surfaces, and associated structures without assuming a human pattern.
Present oral components
Record structures actually present and distinguish anatomical absence from incomplete observation.
- Which structures form the oral margins and occupy or line the oral region? definition
- Which apparently missing structures are confirmed absent, and which were simply not visible? boundary
Opening and closure
Captures the geometry and coordination of oral movement.
Observed mouth mobility
Describe opening and closure using explicit landmarks and observation conditions.
- What opening extent was observed, between which landmarks and in what posture? measurement
- Can the mouth close and perform its usual movements, and what limitations were observed? measurement
Food entry and oral processing Tracks the mouth's contribution to acquiring food and passing it onward.
Food entry is central to mouth identity, while acquisition and processing mechanisms differ substantially between animals.
Acquisition and retention
Describes how food or fluid enters and remains within the oral region.
Intake mechanism
Record supported intake mechanisms and demonstrated success under stated conditions.
- By what observed or documented mechanism does food or fluid enter this mouth? definition
- Under what food, fluid, and posture conditions was successful intake or loss of material observed? measurement
Processing and transfer
Separates oral manipulation from downstream digestive events.
Oral handling sequence
Describe processing that occurs within the mouth and evidence for onward transfer.
- What manipulation or processing occurs within this oral region, if any? definition
- Where does material leave the mouth's defined boundary, and what evidence shows successful transfer? boundary
Sensation and other oral functions Records sensory roles and functions beyond feeding when supported for the organism.
Mouths can participate in sensing, airflow, and signalling, but these roles cannot be assigned universally.
Oral sensation
Locates sensory functions and preserves the distinction between reports and responses.
Sensory capacity evidence
Record evidence for oral sensation without interpreting every response as a particular subjective experience.
- Which sensory functions are documented for structures in this mouth? provenance
- Is the recorded sensation based on an individual's report, an observed response, or a measurement? measurement
Airflow and signalling
Identifies oral participation in breathing, sound modification, or visible signalling where applicable.
Nonfeeding functional role
Distinguish the mouth's contribution from functions owned by connected organs or behavioural models.
- What evidence supports this mouth's participation in airflow, sound modification, or display? provenance
- Which part of that function occurs in the mouth, and which depends on structures or behaviours outside it? boundary
Oral condition and examination Organises local condition observations and the constraints on obtaining further evidence.
Oral visibility is often incomplete, and examination can involve sensitive tissue, discomfort, or defensive behaviour.
Local condition
Records visible changes and reported discomfort at identifiable oral locations.
Located condition observations
Describe oral findings by location, time, and observation method without assigning an unsupported cause.
- Where are changes in surface integrity, moisture, colour, swelling, bleeding, or retained material observed? measurement
- What earlier observation supports calling this a change, and how comparable were the viewing conditions? provenance
Examination constraints
Defines what can be inspected and what requires additional expertise or cooperation.
Appropriate next observation
Choose further observation according to oral accessibility, cooperation, and the examiner's competence.
- Which oral regions remain unobserved because of access, lighting, movement, or limited cooperation? boundary
- What consent, trained handling, or professional expertise is required before a closer or instrumented examination? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- oral vestibule (space between the lips or cheeks and the dental arches)
- oral cavity proper (cavity bounded by the dental arches, palate and floor of the mouth)
- stomodeum (embryonic ectodermal depression that becomes the mouth)
- buccal cavity (comparative-anatomy term, especially in fishes and many invertebrates)
- cytostome (specialised ingestive opening of some unicellular eukaryotes)
- arthropod mouth with gnathal mouthparts
- avian rictal opening bounded by a keratinous beak
- clinical oral cavity as an oncology topography (ICD-O C00-C06)
- Which of these kinds and varieties hold for the sense of mouth this model covers, and on what evidence? provenance
Identifiers and schemes
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Wikidata - Q9635 - Item for the anatomical mouth; oral cavity is a related but narrower item.
- UBERON - UBERON:0000165 - Multi-species anatomy class 'mouth'; oral cavity is a distinct UBERON class.
- Foundational Model of Anatomy (FMA) - FMA:49184 - FMA class Mouth; FMA also records Oral cavity separately (FMA:20292).
- Terminologia Anatomica (TA98/TA2) - A05.1.00.001 - cavitas oris; vestibulum oris and cavitas oris propria are child terms.
- MeSH - D009055 - Descriptor Mouth, under Digestive System / Stomatognathic System.
- ICD-O-3 topography - C00-C06 - Oral cavity sites used in oncology (lip through mouth, NOS); not a name for the organ as such.
- SNOMED CT - 123851003 - Mouth structure (body structure); confirm against the current SNOMED International release before use as a production code.
- Which of these identifiers and schemes hold for the sense of mouth this model covers, and on what evidence? provenance
Standards and regulation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Terminologia Anatomica 2 - FIPAT / International Federation of Associations of Anatomists (authoritative anatomical nomenclature).
- ICD-11, chapter on diseases of the digestive system / oral cavity - World Health Organization (clinical coding of oral disease).
- AJCC/UICC TNM staging for oral cavity carcinoma - American Joint Committee on Cancer and Union for International Cancer Control (site boundaries and stage groups).
- ISO 1942, Dentistry - Vocabulary - International Organization for Standardization, technical committee ISO/TC 106 (dental terms that presuppose the mouth as the working field).
- FDI World Dental Federation two-digit tooth numbering (ISO 3950) - FDI / ISO (identifies teeth within the mouth, not the mouth itself).
- FDA and EMA product-information conventions for the oral route of administration - U.S. Food and Drug Administration and European Medicines Agency (regulatory use of 'oral' as a route, not an anatomy standard).
- Which of these standards and regulation hold for the sense of mouth this model covers, and on what evidence? provenance
Real-world use
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Ingestion, mastication, taste and swallowing of food and drink in daily feeding.
- Human speech: the mouth is the principal resonating and articulatory cavity for most spoken languages.
- Alternative airway in mouth breathing, resuscitation (mouth-to-mouth) and bag-mask or intubation access.
- Clinical oral examination, dentistry, orthodontics and maxillofacial surgery as the working field.
- Oral administration of medicines, vaccines and contrast media.
- Oncology: primary-site assignment and surgical resection of oral cavity cancers.
- Forensic odontology: identification from dentition and bite-mark comparison.
- Comparative biology and palaeontology: feeding-mode inference from jaws, teeth, beaks and mouthparts.
- Which of these real-world use hold for the sense of mouth this model covers, and on what evidence? provenance
Typical measurements
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- maximum unassisted interincisal opening (adult human) - 40-60 - mm
- unstimulated whole-saliva flow rate (healthy adult) - 0.3-0.4 - mL/min
- stimulated whole-saliva flow rate (healthy adult) - 1.0-2.0 - mL/min
- saliva pH (resting whole saliva) - 6.2-7.6 - pH
- sublingual oral temperature (healthy adult at rest) - 36.4-37.2 - °C
- permanent tooth count (complete adult human dentition) - 32 - teeth
- maximum voluntary molar bite force (adult human) - 300-700 - N
- Which of these typical measurements hold for the sense of mouth this model covers, and on what evidence? provenance
Failure modes and hazards
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Upper-airway obstruction by the tongue, oedema, foreign body or haematoma in or around the mouth.
- Aspiration of oral contents into the lower airway, especially with depressed consciousness.
- Oral squamous-cell carcinoma and other mucosal malignancies.
- Dental caries, periodontitis and odontogenic abscess, including deep-neck infection (e.g. Ludwig angina).
- Cleft lip and/or palate from failed fusion of embryonic facial processes.
- Xerostomia with secondary caries, candidiasis and impaired swallowing.
- Trismus or temporomandibular limitation of mouth opening, blocking examination, feeding or intubation.
- Thermal, chemical or radiation injury to oral mucosa.
- Human and animal bite wounds as a source of polymicrobial infection.
- Which of these failure modes and hazards hold for the sense of mouth this model covers, and on what evidence? provenance
Regional variation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Common English uses one word, 'mouth', for the orifice, the cavity, speech ('by word of mouth') and, separately, a river mouth; anatomical English prefers 'oral cavity' once inside the lips.
- Romance and Germanic languages often split the body-part word (French bouche, German Mund) from the geographic homonym (embouchure, Mündung).
- Clinical oncology in North America and Europe treats 'oral cavity' and 'oropharynx' as different primary sites; older records and some public usage collapse both as 'mouth cancer'.
- Dental-arch numbering (FDI vs Universal/Palmer) changes how structures inside the mouth are labelled in charts, not the name of the mouth itself.
- Presence of fleshy lips, cheeks, a secondary palate and heterodont teeth is a mammalian pattern; birds, fishes and arthropods realise the same digestive opening with beaks, unenclosed buccal cavities or jointed mouthparts, so 'mouth' does not imply a human-like oral cavity.
- Cultural practices that load the mouth as a diagnostic or social site (e.g. traditional pulse-and-orifice inspection, betel chewing, ritual tooth modification) change what is noticed in the same anatomy.
- Which of these regional variation hold for the sense of mouth this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- pharynx - The pharynx begins posterior to the oropharyngeal isthmus (palatoglossal arches); it has no teeth or gingiva and continues to the oesophagus and larynx.
- oropharynx - In cancer staging the oropharynx (base of tongue, tonsils, posterior wall) is C01/C09-C10, posterior to the palatoglossal fold; the oral cavity is C00 and C02-C06.
- nasal cavity - Separated from the mouth by the hard and soft palate; lined by respiratory and olfactory mucosa and opening at the nares, not the lips.
- lips - The lips are the anterior wall and mucocutaneous margin of the mouth, not the cavity; vermilion and skin cancers of the lip are coded separately from intra-oral disease.
- mouthparts - In arthropods, mouthparts are paired gnathal appendages around the opening; they are not the digestive orifice itself.
- beak (rhamphotheca) - A keratinous sheath bounding the avian oral opening; the mouth is the rictal opening and cavity inside the beak, not the beak.
- surgical stoma - An iatrogenic opening (tracheostomy, colostomy) named by analogy; it is not the native cranial digestive orifice.
- river mouth - A geographic homonym for the discharge of a watercourse into another body of water; it is not an anatomical structure and is out of PHY.LIV.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of mouth this model covers, and on what evidence? provenance
Sources
- Terminologia Anatomica, 2nd edition - Federative International Programme for Anatomical Terminology (FIPAT), International Federation of Associations of Anatomists - Official anatomical name cavitas oris, subdivision into vestibule and oral cavity proper, and the oropharyngeal isthmus as the posterior boundary.
- Gray's Anatomy: The Anatomical Basis of Clinical Practice, 42nd edition, ed. Susan Standring - Elsevier - Human oral cavity boundaries, contents (teeth, tongue, salivary duct openings), innervation, vascular supply, and relations to the pharynx.
- Medical Subject Headings (MeSH) descriptor Mouth (D009055) - U.S. National Library of Medicine - Controlled biomedical definition of the mouth as an anatomical region and the scope of related oral-disease indexing.
- Uberon, an integrative multi-species anatomy ontology (Mungall et al.) - Genome Biology - Multi-species class mouth (UBERON:0000165) and its distinction from oral cavity, pharynx and mouthparts across metazoa.
- International Classification of Diseases, 11th Revision - World Health Organization - Diseases of the oral cavity as a regulated clinical chapter and the oral cavity as a topography in cancer classification.
- AJCC Cancer Staging Manual, 8th edition - American Joint Committee on Cancer / Union for International Cancer Control - Operational boundary between oral cavity and oropharynx used in cancer staging, and the clinical meaning of 'oral cavity' as a site.
What the second pass must settle
- Does the registry intend mouth to cover animal mouths generally, human mouths specifically, or only the oral aperture?
- Which existing Vercy models already own the oral cavity or mouth, and should this entry link to one of them?
- Which comparative anatomical references should govern boundaries and terminology across the taxa covered?
- How should this model represent animals whose mouth also serves other digestive exchanges, or whose oral structures change substantially between life stages?
- Which taxon- and life-stage-specific methods and reference ranges are needed before oral measurements can support judgements about functional limitation?