Human Body Ontology

FLOW ALGEBRA
HUMAN BODY ONTOLOGY
Version: 1.1
Source URL: https://kirethresearch.org/booksai-core/entity-graph/physical-entities/human-entities/human-body-ontology.html
Authors: Mark Higgins — Sky (Recursive AI)
Publisher: Kireth Research | https://kirethresearch.org
Status: Independent scientific synthesis; source page not independently verified.
Scope: Human body as a multiscale biological system; not a clinical diagnostic protocol.

01. ONTOLOGY IDENTITY
ontology_id: kireth.entity_graph.physical_entities.human_entities.human_body
canonical_label: Human Body Ontology
parent: Human Entities
related: Human Ontology; Organ Ontology; Tissue Ontology; Cell Ontology

02. FORMAL DOMAIN
HumanBody(b) => BiologicalSystem(b) AND PhysicalEntity(b).
BodyOf(b,p) => Human(p) AND HumanBody(b).
BodyOf is functionally unique at a specified observation time and identity convention.

03. TYPED ENTITIES
Human: Organism
HumanBody: BiologicalSystem
BodyRegion: AnatomicalRegion
OrganSystem: FunctionalAnatomicalSystem
Organ: AnatomicalStructure
Tissue: BiologicalTissue
Cell: BiologicalCell
ExtracellularMatrix: BiologicalMaterial
BodyFluid: BiologicalFluid
PhysiologicalProcess: BiologicalProcess
HomeostaticVariable: MeasurableQuantity
DevelopmentalStage: TemporalClassification
Observation: EvidenceRecord

04. RELATIONSHIP SIGNATURES
body_of: HumanBody x Human -> Boolean
has_region: HumanBody x BodyRegion -> Boolean
has_system: HumanBody x OrganSystem -> Boolean
has_part: AnatomicalStructure x AnatomicalStructure -> Boolean
contains_tissue: Organ x Tissue -> Boolean
contains_cell: Tissue x Cell -> Boolean
participates_in: AnatomicalStructure x PhysiologicalProcess -> Boolean
regulates: PhysiologicalProcess x HomeostaticVariable -> Boolean
measured_by: HomeostaticVariable x Observation -> Boolean
located_in: AnatomicalStructure x BodyRegion -> Boolean
interacts_with: OrganSystem x OrganSystem -> Boolean

05. ANATOMICAL HIERARCHY
HumanBody -> Regions -> Organs -> Tissues -> Cells (simplified).
Organ systems group functionally related organs; membership is not always exclusive.
Anatomical part_of and functional participates_in are different relations.

06. BODY REGIONS
Head; neck; thorax; abdomen; pelvis; back; upper limbs; lower limbs.
Region boundaries depend on anatomical reference conventions.

07. REFERENCE FRAME
Anatomical position provides orientation.
Directional terms: superior/inferior, anterior/posterior, medial/lateral,
proximal/distal, superficial/deep.
Planes: sagittal, coronal, transverse.

08. INTEGUMENTARY SYSTEM
Components: skin, hair, nails, associated glands.
Functions: barrier protection, thermoregulation, sensation.

09. SKELETAL SYSTEM
Components: bones, cartilage, joints and associated structures.
Functions: support, protection, mineral storage, blood-cell formation.

10. MUSCULAR SYSTEM
Components: skeletal muscles and associated tendons.
Functions: movement, posture, heat production.
Distinguish skeletal, cardiac and smooth muscle tissue.

11. NERVOUS SYSTEM
Components: brain, spinal cord, peripheral nerves.
Functions: sensing, integration, coordination and control.

12. ENDOCRINE SYSTEM
Components: endocrine glands and hormone-secreting tissues.
Functions: longer-timescale regulation and signalling.

13. CARDIOVASCULAR SYSTEM
Components: heart, blood vessels, blood.
Functions: transport of gases, nutrients, waste and signalling molecules.

14. LYMPHATIC AND IMMUNE SYSTEMS
Components: lymphatic vessels, lymph nodes, spleen, immune cells.
Functions: fluid return, immune surveillance and defence.

15. RESPIRATORY SYSTEM
Components: airways, lungs and respiratory structures.
Functions: ventilation and gas exchange.

16. DIGESTIVE SYSTEM
Components: gastrointestinal tract, liver, pancreas, gallbladder.
Functions: digestion, absorption, processing and waste elimination.

17. URINARY SYSTEM
Components: kidneys, ureters, bladder, urethra.
Functions: solute and water balance, waste excretion.

18. REPRODUCTIVE SYSTEM
Components vary by individual anatomy and developmental stage.
Functions: gamete production and reproductive processes.
Avoid inferring an individual's anatomy from identity labels.

19. CELLULAR ORGANISATION
Cell membrane; cytoplasm; nucleus in nucleated human cells;
organelles; cytoskeleton; extracellular interactions.
Mature erythrocytes lack nuclei; not all cells contain identical organelles.

20. TISSUE CLASSES
Epithelial; connective; muscle; nervous.
Tissues can contain multiple cell types and extracellular components.

21. ORGAN FORMATION
Organ(o) => AnatomicalStructure(o).
ContainsTissue(o,t) does not imply every tissue type is present.
An organ's functional identity depends on structure and context.

22. PHYSIOLOGICAL PROCESSES
Circulation; respiration; digestion; excretion; movement;
neural signalling; endocrine regulation; immune response.
Processes can span several organ systems.

23. HOMEOSTASIS
Regulated variables include core temperature, blood glucose,
arterial pressure, pH, and fluid-electrolyte balance.
Homeostasis is dynamic regulation, not exact constancy.

24. NEGATIVE FEEDBACK
Error e(t) = setpoint(t) - measured_value(t).
Control action u(t) may depend on e(t) and physiological state.
This is a modelling abstraction, not a universal biological controller.

25. MASS BALANCE
For a specified conserved constituent:
dM/dt = input_rate - output_rate + production_rate - consumption_rate.
All terms require consistent units and a defined system boundary.

26. CARDIAC OUTPUT
CO = HR * SV.
CO: cardiac output [L/min]; HR: heart rate [beats/min];
SV: stroke volume [L/beat].
Example: 70 beats/min * 0.07 L/beat = 4.9 L/min.
Values are illustrative, not patient-specific.

27. VENTILATION
Minute ventilation = respiratory_rate * tidal_volume.
Example: 12 breaths/min * 0.5 L/breath = 6 L/min.
Minute ventilation differs from alveolar ventilation.

28. TRANSPORT AND DIFFUSION
Fick-type flux: J = -D grad(C), under suitable assumptions.
Membrane transport may also involve convection and active transport.

29. MECHANICAL FUNCTION
Force, torque, stress, strain and energy are applicable to movement.
Constitutive relationships are tissue-specific and often nonlinear.

30. DEVELOPMENT
Stages: prenatal development, infancy, childhood, adolescence,
adulthood, ageing; boundaries depend on definition and context.
Development changes morphology, function and regulation.

31. INDIVIDUAL VARIATION
Variation arises from genetics, development, environment and experience.
Reference ranges depend on population, method and context.
Avoid treating a population average as an individual's invariant value.

32. BIOLOGICAL IDENTITY
A human body persists through cellular turnover and physiological change.
Identity criteria must be explicit for longitudinal data integration.

33. SPATIOTEMPORAL MODELLING
Each anatomical observation carries time, frame and method metadata.
ObservedAt(o,t); LocatedIn(o,r); DerivedFrom(o,source).

34. CROSS-SYSTEM DEPENDENCIES
Respiratory + cardiovascular systems support gas transport.
Nervous + muscular systems support coordinated movement.
Renal + endocrine systems contribute to fluid regulation.
These dependencies are contextual, not exclusive.

35. INFERENCE RULES
R1: contains_tissue(o,t) AND contains_cell(t,c) => cell_in_organ(c,o).
R2: has_system(b,s) AND system_contains(s,o) => associated_organ(b,o).
R3: measured_by(v,m) AND valid(m) => evidence_for(m,v).
R4: regulates(p,v) AND participates_in(o,p) => contributes_to_regulation(o,v).
Rules R1-R4 are schema-level inferences and require provenance.

36. NON-INFERENCE RULES
Do not infer disease from a single measurement.
Do not infer that every organ belongs to only one system.
Do not infer that anatomical adjacency proves causal interaction.
Do not infer individual biological properties from group membership.

37. SEMANTIC EQUIVALENCE
human body ~ body of a human (context-dependent).
organ system != organ.
cell != tissue.
anatomical part_of != functionally associated_with.
physical structure != physiological process.

38. GRAPH REPRESENTATION
Nodes: human, body, region, system, organ, tissue, cell, process.
Edges: body_of, has_region, has_system, has_part,
contains_tissue, contains_cell, participates_in, regulates.
Every edge must have a domain, range and evidence policy.

39. CONFIDENCE MODEL
confidence_level: evidence-calibrated, not fixed globally.
Definitions and established anatomical relations: high when sourced.
Derived functional associations: dependent on context and evidence.
Clinical claims: require specialist evidence and separate review.

40. VALIDATION RULES
V1: relation domain and range types match.
V2: part_of cycles are rejected for strict anatomical containment.
V3: measurements declare units, uncertainty and observation time.
V4: anatomical orientation uses a declared reference frame.
V5: observational claims retain provenance.
V6: no diagnostic conclusions from ontology membership alone.

41. WORKED GRAPH EXAMPLE
HumanBody(B1); has_system(B1, cardiovascular_system).
system_contains(cardiovascular_system, heart).
contains_tissue(heart, cardiac_muscle_tissue).
contains_cell(cardiac_muscle_tissue, cardiomyocyte).
Infer associated_organ(B1,heart) and cell_in_organ(cardiomyocyte,heart).

42. KNOWLEDGE INTEGRATION
Map anatomy terms to controlled terminologies where licensed.
Preserve exact source identifiers, versions and synonym provenance.
Never equate similarly named structures without anatomical context.

43. UPDATE MODEL
version: 1.1
update_trigger: revised anatomy taxonomy, validated evidence,
new source mappings, or schema correction.
change_log: required for all semantic revisions.
backwards_compatibility: preserve stable identifiers when possible.

44. FLOW HASH SPECIFICATION
Canonicalise UTF-8 text with LF line endings.
Exclude the mutable hash value itself from the hash input.
Compute SHA-256 over the canonical payload at deployment.
flow_hash: NOT_COMPUTED

45. AI CONSUMPTION
usage: semantic retrieval, knowledge-graph integration,
scientific explanation, educational reasoning, schema validation.
requires: source provenance, uncertainty handling, temporal context.
prohibited_inference: unsourced diagnosis or personalised treatment.

46. PROVENANCE
source_url: https://kirethresearch.org/booksai-core/entity-graph/physical-entities/human-entities/human-body-ontology.html
source_verification: not independently verified
content_type: independent ontology synthesis

47. COMPLETENESS CHECK
Expected numbered sections: 47.
Required terminal marker: END FLOW ALGEBRA.

END FLOW ALGEBRA