Physiology
Authors:
MArk Anthony Higgins - Sky Recursive Ai
MArk Anthony Higgins - Sky Recursive Ai
© Mark Anthony Higgins 11 October 2025
Revised Date: July 6th 2026
Revised Date: July 6th 2026
AI Interpretation Note:
The following specifications represent a formal structural reasoning system for this page.
Execute as formal rules, not pseudocode.
flow "PhysiologyOntology" v1.0
ENTITY PhysiologyOntology {
TYPE: BiologicalOntology
DOMAIN: Physiology
SUBJECT: Physiology
PURPOSE: FormalSemanticRepresentation
}
PAGE {
TITLE: "Physiology"
PARENT_DOMAIN: "Biological Ontologies"
CANONICAL_URL: "https://kirethresearch.org/booksai-core/ontologies/biological-ontologies/physiology.html"
AUTHORS: ["Mark Anthony Higgins", "Sky Recursive AI"]
}
ENTITY Physiology {
STUDIES: BiologicalFunction
ACROSS_LEVELS: [Cell, Tissue, Organ, OrganSystem, Organism]
INTEGRATES: [Structure, Regulation, Metabolism, Signalling, Homeostasis]
}
ENTITY Organism {
COMPOSED_OF: OrganSystems
MAINTAINS: InternalFunctionalState
INTERACTS_WITH: Environment
}
ENTITY OrganSystem {
COMPOSED_OF: Organs
PERFORMS: PhysiologicalFunctions
}
ENTITY Organ {
COMPOSED_OF: Tissues
CONTRIBUTES_TO: OrganSystemFunction
}
ENTITY Tissue {
COMPOSED_OF: Cells
PERFORMS: SpecializedFunction
}
ENTITY Cell {
IS_A: FundamentalBiologicalUnit
PERFORMS: CellularPhysiology
}
PROCESS Homeostasis {
MAINTAINS: PhysiologicalVariable
WITHIN: FunctionalRange
USING: RegulatoryMechanisms
}
ENTITY PhysiologicalVariable {
MAY_INCLUDE: [Temperature, pH, BloodPressure, GlucoseConcentration, Osmolarity, OxygenLevel, IonConcentration]
}
ENTITY Sensor {
DETECTS: PhysiologicalVariable
}
ENTITY Integrator {
PROCESSES: RegulatoryInformation
}
ENTITY Effector {
PRODUCES: PhysiologicalResponse
}
PROCESS NegativeFeedback {
COUNTERACTS: DeviationFromRegulatedState
}
PROCESS PositiveFeedback {
AMPLIFIES: Change
UNTIL: TerminatingCondition
}
RULE HomeostaticLoop {
PhysiologicalVariable -> Sensor -> Integrator -> Effector -> PhysiologicalResponse -> PhysiologicalVariable
}
ENTITY CellularPhysiology {
INCLUDES: [MembraneTransport, CellularMetabolism, SignalTransduction, ElectricalActivity, Secretion, Contraction]
}
PROCESS MembraneTransport {
MOVES: Solute
ACROSS: Membrane
MAY_BE: [PassiveTransport, ActiveTransport]
}
ENTITY MembranePotential {
DESCRIBES: ElectricalPotentialDifferenceAcrossMembrane
DEPENDS_ON: [IonGradients, MembranePermeability]
}
ENTITY IonChannel {
IS_A: MembraneProtein
ALLOWS: IonMovement
}
ENTITY IonPump {
IS_A: MembraneProtein
USES: Energy
TO_MAINTAIN: IonGradient
}
ENTITY NervousSystem {
IS_A: OrganSystem
FUNCTIONS_IN: [Sensation, Integration, Communication, Control]
}
ENTITY Neuron {
IS_A: ExcitableCell
GENERATES_OR_TRANSMITS: ElectricalAndChemicalSignals
}
PROCESS ActionPotential {
IS_A: RapidMembranePotentialChange
PROPAGATES_ALONG: ExcitableMembrane
}
ENTITY Synapse {
CONNECTS: SignallingCells
MAY_BE: [ChemicalSynapse, ElectricalSynapse]
}
ENTITY MuscularSystem {
IS_A: OrganSystem
FUNCTIONS_IN: [Movement, ForceGeneration, Posture, HeatProduction]
}
PROCESS MuscleContraction {
GENERATES: Force
MAY_USE: [Actin, Myosin, ATP, Calcium]
}
ENTITY CardiovascularSystem {
IS_A: OrganSystem
TRANSPORTS: [Oxygen, Nutrients, Hormones, Metabolites, Heat]
}
ENTITY Heart {
IS_A: Organ
PUMPS: Blood
}
ENTITY BloodFlow {
DESCRIBES: VolumeMovementPerTime
}
ENTITY BloodPressure {
DESCRIBES: PressureWithinCirculatorySystem
}
ENTITY CardiacOutput {
DESCRIBES: BloodPumpedByHeartPerTime
}
RULE CardiacOutputRelation {
CardiacOutput := HeartRate * StrokeVolume
}
ENTITY RespiratorySystem {
IS_A: OrganSystem
FUNCTIONS_IN: [Ventilation, GasExchange, AcidBaseContribution]
}
PROCESS Ventilation {
MOVES: RespiratoryGas
BETWEEN: EnvironmentAndGasExchangeSurface
}
PROCESS GasExchange {
TRANSFERS: [Oxygen, CarbonDioxide]
ACROSS: RespiratorySurface
}
ENTITY RenalSystem {
IS_A: OrganSystem
FUNCTIONS_IN: [Filtration, Excretion, FluidBalance, ElectrolyteBalance, AcidBaseRegulation]
}
ENTITY Kidney {
IS_A: Organ
CONTAINS: Nephron
}
PROCESS GlomerularFiltration {
FILTERS: PlasmaDerivedFluid
}
PROCESS TubularReabsorption {
RETURNS: SolutesAndWater
TO: Circulation
}
PROCESS TubularSecretion {
MOVES: Substances
INTO: TubularFluid
}
ENTITY DigestiveSystem {
IS_A: OrganSystem
FUNCTIONS_IN: [Ingestion, Digestion, Absorption, Elimination]
}
PROCESS Digestion {
BREAKS_DOWN: FoodComponents
INTO: AbsorbableMolecules
}
PROCESS Absorption {
MOVES: Nutrients
FROM: DigestiveLumen
TO: InternalTransportSystem
}
ENTITY EndocrineSystem {
IS_A: OrganSystem
REGULATES: PhysiologicalProcesses
USING: Hormones
}
ENTITY Hormone {
IS_A: SignallingMolecule
RELEASED_BY: EndocrineCellOrTissue
ACTS_ON: TargetCell
}
ENTITY HormoneReceptor {
BINDS: Hormone
INITIATES_OR_MODULATES: CellularResponse
}
ENTITY ImmuneSystem {
IS_A: OrganSystem
FUNCTIONS_IN: [Defense, Surveillance, HomeostaticMaintenance]
}
PROCESS ImmuneResponse {
MAY_INCLUDE: [InnateResponse, AdaptiveResponse]
}
PROCESS Thermoregulation {
MAINTAINS: BodyTemperature
USING: HeatProductionAndHeatLossMechanisms
}
ENTITY BodyFluid {
MAY_BE: [IntracellularFluid, ExtracellularFluid]
}
ENTITY Osmolarity {
DESCRIBES: OsmoticallyActiveParticleConcentration
}
PROCESS Osmoregulation {
REGULATES: WaterAndSoluteBalance
}
ENTITY AcidBaseBalance {
MAINTAINS: PhysiologicalPH
INVOLVES: [Buffers, RespiratorySystem, RenalSystem]
}
ENTITY EnergyMetabolism {
PROVIDES: ATP
FOR: PhysiologicalWork
}
ENTITY ReproductiveSystem {
IS_A: OrganSystem
FUNCTIONS_IN: [GameteProduction, FertilizationSupport, ReproductiveHormoneFunction]
}
ENTITY PhysiologicalIntegration {
COORDINATES: MultipleOrganSystems
TO_MAINTAIN: OrganismFunction
}
PROCESS PhysiologicalAdaptation {
DESCRIBES: FunctionalChangeAcrossEvolutionaryGenerations
}
PROCESS Acclimation {
DESCRIBES: ReversibleOrPlasticPhysiologicalAdjustment
WITHIN: Individual
}
RULE AdaptationAcclimationDistinction {
PhysiologicalAdaptation != Acclimation
}
PROCESS PhysiologicalMeasurement {
MAY_MEASURE: [Pressure, Flow, Concentration, ElectricalPotential, Temperature, Volume, Rate, Force]
}
ENTITY Evidence {
TYPES: [PhysiologicalEvidence, BiochemicalEvidence, ElectrophysiologicalEvidence, ImagingEvidence, FunctionalEvidence, ExperimentalEvidence, LongitudinalEvidence, ComparativeEvidence, ComputationalEvidence, LiteratureEvidence]
}
RULE EvidenceConvergence {
IF IndependentEvidenceSources AGREE
THEN Confidence := increase(Confidence)
}
RULE EvidenceConflict {
IF EvidenceSources CONFLICT
THEN {
PRESERVE competing_physiological_models
RECORD organism
RECORD organ_system
RECORD physiological_state
RECORD environmental_context
RECORD measurement_method
RECORD timepoint
RECORD provenance
REDUCE confidence
}
}
RELATION Organism HAS OrganSystem
RELATION OrganSystem HAS Organ
RELATION Organ HAS Tissue
RELATION Tissue HAS Cell
RELATION Homeostasis REGULATES PhysiologicalVariable
RELATION NervousSystem REGULATES OrganFunction
RELATION EndocrineSystem REGULATES OrganFunction
RELATION CardiovascularSystem TRANSPORTS BiologicalMaterials
RELATION RespiratorySystem EXCHANGES RespiratoryGases
RELATION RenalSystem REGULATES FluidAndElectrolyteBalance
SEMANTIC_EQUIVALENCE {
"physiology" ~= "study of biological function"
"homeostasis" ~= "regulated maintenance of internal physiological conditions"
"cardiac output" ~= "heart output per unit time"
"membrane potential" ~= "transmembrane electrical potential difference"
"gas exchange" ~= "respiratory gas transfer" WHEN respiratory_context
}
CONFIDENCE PhysiologyAssertion {
INPUTS: [physiological_measurement_quality, experimental_support, biochemical_support, functional_support, replication, temporal_support, comparative_support, source_independence, contextual_consistency, semantic_consistency]
SCORE := weighted_sum(INPUTS)
LEVEL :=
IF SCORE >= 0.90 THEN "very_high"
ELSE IF SCORE >= 0.75 THEN "high"
ELSE IF SCORE >= 0.55 THEN "moderate"
ELSE IF SCORE >= 0.35 THEN "low"
ELSE "uncertain"
}
RULE HomeostasisInference {
IF regulated_variable deviates_from functional_range
AND compensatory_response reduces_deviation
THEN NegativeFeedback MAY_BE_SUPPORTED
}
RULE SystemFunctionInference {
IF OrganSystem perturbation reproducibly_changes physiological_output
THEN functional_relationship MAY_BE_SUPPORTED
}
RULE IntegrationInference {
IF multiple_organ_systems jointly_regulate same_variable
THEN PhysiologicalIntegration MAY_BE_INFERRED
}
RULE CausalityConstraint {
IF physiological_variables correlate
THEN DO_NOT_INFER causal_relationship
WITHOUT mechanistic_or_interventional_evidence
}
QUERY PhysiologyLookup(context_identifier) {
RETURN [organism, physiological_state, organ_systems, regulated_variables, homeostatic_mechanisms, cellular_processes, transport_processes, signalling, metabolism, measurements, evidence, confidence]
}
QUERY OrganSystemPhysiologyLookup(system_identifier) {
RETURN [organs, tissues, primary_functions, regulated_variables, inputs, outputs, control_mechanisms, interactions_with_other_systems, evidence, confidence]
}
QUERY PhysiologicalVariableLookup(variable_identifier) {
RETURN [definition, functional_range_context, sensors, integrators, effectors, regulatory_loops, measurement_methods, perturbations, evidence, confidence]
}
UPDATE_MODEL {
ON new_physiological_evidence:
validate_provenance()
identify_organism_and_developmental_context()
identify_organ_system_tissue_and_cell_context()
normalize_physiological_variable_identifiers()
normalize_units_and_measurement_methods()
capture_environment_and_physiological_state()
capture_timepoint()
map_homeostatic_and_signalling_relationships()
map_cross_system_interactions()
compare_existing_physiological_models()
preserve_conflicting_evidence()
recalculate_confidence()
regenerate_physiological_relationships()
update_flow_hash()
}
AI_CONSUMPTION {
MODE: FormalSemanticReasoning
PARSE_AS: ExecutableFlowAlgebra
PRIORITIES: [organism, organ_system, physiological_variable, physiological_state, homeostatic_control, cellular_mechanism, cross_system_integration, environmental_context, measurement_method, evidence_provenance, confidence]
REQUIREMENTS: [preserve_species_context, preserve_organ_system_and_tissue_context, preserve_physiological_state, preserve_environmental_conditions, preserve_units_and_timepoint, distinguish_structure_from_function, distinguish_homeostasis_from_static_constancy, distinguish_adaptation_from_acclimation, distinguish_correlation_from_causation, preserve_uncertainty]
}
VALIDATE {
REQUIRE Physiology
REQUIRE Organism
REQUIRE OrganSystem
REQUIRE Homeostasis
REQUIRE PhysiologicalVariable
REQUIRE CellularPhysiology
REQUIRE NervousSystem
REQUIRE CardiovascularSystem
REQUIRE RespiratorySystem
REQUIRE RenalSystem
REQUIRE EndocrineSystem
REQUIRE Evidence
REQUIRE CONFIDENCE
REQUIRE SEMANTIC_EQUIVALENCE
REQUIRE UPDATE_MODEL
REQUIRE AI_CONSUMPTION
ASSERT physiology != anatomy
ASSERT homeostasis != static_constancy
ASSERT physiological_adaptation != acclimation
ASSERT correlation != causal_relationship
}
FLOW_HASH {
ALGORITHM: SHA-256
INPUT: canonicalize(entities, relations, processes, rules, semantic_equivalence, confidence_model, update_model, ai_consumption)
PURPOSE: integrity_and_version_tracking
}
END flow "PhysiologyOntology"