# Nervous system
## MicroSim spec
- **Recommended sim type:** [[Wave|wave]] animation
- **Microsimmability score:** 62/100
- **Layout:** stock reservoir with inflow/outflow arrows on the canvas; sliders below.
### Parameters (tunable controls)
- `Inflow rate`
- `Outflow rate`
- `Initial stock`
### What animates
A stock fills and drains as inflow and outflow rates change; the level and net flow update live toward equilibrium.
### Learning objective
Relate inflow/outflow balance to whether a stock grows, depletes, or holds steady.
## Links (Wikipedia order)
<!-- injected from _registry/childlinks/Nervous_system.json (2026-07-30T02:09:12Z) -->
`Abdomen` · `Abstraction` · `Acetylcholine` · `Action_potential` · `Active_zone` · `Adrenal_gland` · `Afferent_nerve_fiber` · `African_elephant` · `Alpha_motor_neuron` · `Amacrine_cell` · `Anatomical_terminology` · `Animal` · `Apical_dendrite` · `Appendix_(anatomy)` · `Artery` · `Arthropod` · `Arthropod_mouthparts` · `Association_fiber` · `Astrocyte` · [[Attractor]] · `Autapse` · `Autonomic_ganglion` · `Autonomic_nervous_system` · `Axolemma` · `Axon` · `Axon_guidance` · `Axon_hillock` · `Axon_terminal` · `Axoplasm` · `Basal_dendrite` · `Basal_ganglia` · `Behavior` · `Behaviorism` · `Beta_motor_neuron` · `Bilateria` · `Biliary_tract` · `Biology` · `Bipolar_neuron` · `Blood–brain_barrier` · `Bone` · `Bone_marrow` · `Bone_morphogenetic_protein` · `Brain` · `Brainstem` · `Breast` · `Bronchus` · `Bulbous_corpuscle` · `Caenorhabditis_elegans` · `Carpal_bones` · `Carpal_tunnel_syndrome` · `Cartilage` · `Cartilaginous_joint` · `Cellular_differentiation` · `Central_nervous_system` · `Central_pattern_generator` · `Cerebellum` · `Cerebral_cortex` · `Cerebrum` · [[Chaos_theory]] · `Charles_Scott_Sherrington` · `Chemical_synapse` · `Chordin` · `Circadian_rhythm` · `Circulatory_system` · `Circumesophageal_nerve_ring` · `Clavicle` · `Cnidaria` · `Cognitive_model` · `Command_neuron` · `Commissural_fiber` · `Commissure` · `Common_coding_theory` · [[Complex_system]] · `Compound_eye` · `Connective_tissue` · `Connectome` · `Coral` · `Cranial_cavity` · `Cranial_nerves` · `Crustacean` · `Culture` · `Dale's_principle` · [[Decision-making]] · `Decussation` · `Dendrite` · `Dendritic_spine` · `Depolarization` · `Deuterostome` · `Development_of_the_nervous_system` · `Development_of_the_nervous_system_in_humans` · `Diabetes` · `Diabetic_neuropathy` · `Diencephalon` · `Dopamine` · `Dorland's_medical_reference_works` · `Dorsal_ramus_of_spinal_nerve` · `Dorsal_root_ganglion` · `Dorsal_root_of_spinal_nerve` · `Drosophila` · `Dura_mater` · `Ear` · `Earthworm` · `Echinoderm` · `Ectoderm` · `Ediacaran` · `Efferent_nerve_fiber` · `Egyptians` · `Electrical_synapse` · `Electrophysiology` · `Endocrine_system` · `Endoderm` · `Endoneurium` · `Enteric_nervous_system` · `Ependyma` · `Epineurium` · `Esophagus` · `Evolution_of_nervous_systems` · `Fate_mapping` · `Feature_detection_(nervous_system)` · `Female_reproductive_system` · `Femur` · `Fibrous_joint` · `Fibula` · `Fly` · `Forebrain` · `Foundational_Model_of_Anatomy` · `Free_nerve_ending` · `Funiculus_(neuroanatomy)` · `Gamma_motor_neuron` · `Ganglion` · `Gap_junction` · `Genitourinary_system` · `Genome` · `Glia` · `Glutamic_acid` · `Glymphatic_system` · `Golgi_tendon_organ` · `Granule_cell` · `Gray's_Anatomy` · `Gray_ramus_communicans` · `Greeks` · `Grey_matter` · `Group_A_nerve_fiber` · `Group_C_nerve_fiber` · `Growth_cone` · `Guillain–Barré_syndrome` · `Haematopoietic_system` · `Hair_cell` · `Heart` · `Hindbrain` · [[Homeostasis]] · `Homology_(biology)` · `Hormone` · `Human_anus` · `Human_body` · `Human_brain` · `Human_digestive_system` · `Human_eye` · `Human_mouth` · `Human_musculoskeletal_system` · `Human_nose` · `Human_penis` · `Human_reproductive_system` · `Human_skeleton` · `Human_skin` · `Human_tooth` · `Humerus` · `Hyperpolarization_(biology)` · `Immune_system` · [[Information]] · `Insect` · `Integumentary_system` · `Interneuron` · `Internodal_segment` · `Jellyfish` · `Joint` · `Kidney` · `Language` · `Large_intestine` · `Larynx` · `Latin` · `Lemniscus_(anatomy)` · `Leprosy` · `Lidocaine` · `Ligand-gated_ion_channel` · `Limbic_system` · `Lip` · `List_of_nerves_of_the_human_body` · `List_of_regions_in_the_human_brain` · `Liver` · `Local_anesthetic` · `Long-term_potentiation` · `Lower_motor_neuron` · `Lung` · `Lymph_node` · `Lymphatic_system` · `Lymphatic_vessel` · `Lymphocyte` · `Male_reproductive_system` · `Mammary_gland` · `Mandible` · `Mathematics` · `Mauthner_cell` · `Medical_Subject_Headings` · `Medium_spiny_neuron` · `Medulla_oblongata` · `Membrane_potential` · `Meninges` · `Merkel_nerve_ending` · `Mesoderm` · `Mesozoa` · `Metacarpal_bones` · `Metatarsal_bones` · `Microglia` · `Microscope` · `Midbrain` · `Mirror_neuron` · `Mollusca` · `Motor_nerve` · `Motor_neuron` · `Motor_planning` · `Multiple_sclerosis` · `Multipolar_neuron` · `Muscle` · `Muscle_cell` · `Muscle_spindle` · `Muscular_system` · `Myelin` · `Myelin_incisure` · `NMDA_receptor` · `Nematode` · `Nerve` · `Nerve_fascicle` · `Nerve_net` · `Nerve_tract` · `Nervous_system_(disambiguation)` · `Nervous_tissue` · [[Neural_circuit]] · `Neural_crest` · `Neural_groove` · `Neural_pathway` · `Neural_plate` · `Neural_tube` · `Neurilemma` · `Neuroblast` · `Neurofilament` · `Neurogenesis` · `Neurology` · `Neuromodulation` · `Neuromuscular_junction` · `Neuron` · `Neuropil` · [[Neuroscience]] · `Neurotransmitter` · `Neurotransmitter_receptor` · `Neurotransmitter_transporter` · `Neurotrophin` · `Neurovascular_unit` · `Neurulation` · `Nissl_body` · `Nociceptor` · `Node_of_Ranvier` · `Noggin_(protein)` · `Nucleus_(neuroanatomy)` · `Nutrition` · `Olfactory_receptor_neuron` · `Oligodendrocyte` · `Oligodendrocyte_progenitor_cell` · `Optic_nerve` · `Organ_(biology)` · `Ossicles` · `Ovary` · `Pacinian_corpuscle` · `Pancreas` · `Pancreatic_islets` · `Paralysis` · `Parasympathetic_nervous_system` · `Parathyroid_gland` · `Parietal_lobe` · `Patella` · `Pathogen` · `Pelvis` · `Peptide` · `Perception` · `Perineurium` · `Peripheral_nervous_system` · `Peripheral_neuropathy` · `Phalanx_bone` · `Pharynx` · `Pheromone` · `Photoreceptor_cell` · `Pineal_gland` · `Pituitary_gland` · `Placenta` · `Placozoa` · `Pons` · `Postganglionic_nerve_fibers` · `Postsynaptic_density` · `Preganglionic_nerve_fibers` · `Premotor_cortex` · `Primary_somatosensory_cortex` · `Primate` · `Projection_fiber` · `Prostate` · `Pseudounipolar_neuron` · `Psychiatry` · `Psychology` · `Purkinje_cell` · `Pyramidal_cell` · `Radiata` · `Radius_(bone)` · `Ramus_communicans` · `Rectum` · `Reflex` · `Reflex_arc` · `Renshaw_cell` · `René_Descartes` · `Respiratory_system` · `Respiratory_tract` · `Retina` · `Reward_system` · `Rib` · `Ribbon_synapse` · `Roman_people` · `Salivary_gland` · `Satellite_glial_cell` · `Scholarpedia` · `Schwann_cell` · `Scrotum` · `Sea_anemone` · `Second_messenger_system` · `Senescence` · `Sense` · `Sensory_nerve` · `Sensory_neuron` · `Sentience` · `Series_and_parallel_circuits` · `Shingles` · `Skull` · `Small_intestine` · [[Society]] · `Sociology` · `Soma_(biology)` · `Somatic_nervous_system` · `Spinal_canal` · `Spinal_cord` · `Spinal_nerve` · `Spleen` · `Sponge` · `Squid_giant_axon` · `Squid_giant_synapse` · `Sternum` · `Stomach` · `Subcutaneous_tissue` · `Superior_colliculus` · `Supplementary_motor_area` · `Suprachiasmatic_nucleus` · `Sympathetic_nervous_system` · `Synapse` · `Synaptic_plasticity` · `Synaptic_vesicle` · `Synovial_joint` · `Tactile_corpuscle` · `Tanycyte` · `Tarsus_(skeleton)` · `Taste_receptor` · `Tendon` · `Terminologia_Anatomica` · `Testicle` · `Thalamus` · `Theory_of_mind` · `Thoracic_diaphragm` · `Thymus` · `Thyroid` · `Tibia` · `Tongue` · `Trachea` · `Transverse_plane` · `Type_II_sensory_fiber` · `Type_Ia_sensory_fiber` · `Ulna` · `Ulnar_nerve` · `Unipolar_neuron` · `Upper_motor_neuron` · `Ureter` · `Urethra` · `Urinary_system` · `Uterus` · `Vagina` · `Vein` · `Ventral_nerve_cord` · `Ventral_ramus_of_spinal_nerve` · `Ventral_root_of_spinal_nerve` · `Vertebra` · `Vertebrate` · `Visual_perception` · `Visual_system` · `Von_Economo_neuron` · `Vulva` · `Walter_Pitts` · `Warren_Sturgis_McCulloch` · [[Wayback_Machine]] · `White_matter` · `White_ramus_communicans` · `Worm` · `Étienne_Geoffroy_Saint-Hilaire`
## From the Real GENERATIVE library (beauty pass)
*Nervous system — animation hotlinked from Wikimedia Commons (via the Real G.E.N.E.R.A.T.I.V.E. course library, Engineering room). [Details & license](https://commons.wikimedia.org/wiki/File:Gastropod_nervous_system.gif).*
*Nervous system — image hotlinked from Wikimedia Commons (via the Real G.E.N.E.R.A.T.I.V.E. course library, Engineering room). [Details & license](https://commons.wikimedia.org/wiki/File:TE-Nervous_system_diagram.svg).*
> In biology, the nervous system is the highly complex part of an animal that coordinates its actions and sensory information by transmitting signals to and from different parts of its body. The nervous system detects environmental changes that impact the body, then works in tandem with the endocrine system to respond to such events.[1] Nervous tissue first arose in wormlike organisms about 550 to 600 million years ago. ([Wikipedia](https://en.wikipedia.org/wiki/Nervous_system))
<!-- BEAUTY-PASS-MEDIA:END -->
> p5.js MicroSim stub · part of [[System]] · [Wikipedia source](https://en.wikipedia.org/wiki/Nervous_system)
> Relation: subfield of System.
## Concept summary
In biology, the nervous system is the highly complex part of an animal that coordinates its actions and sensory [[Information|information]] by transmitting signals to and from different parts of its body.
## Build checklist
- [ ] Claim it: set `status: in-progress` + `lease` + `leased_at`
- [ ] Write the child page explaining the concept (tie it back to system)
- [ ] Finalize parameter ranges and defaults
- [ ] Implement the p5.js sketch (drawing + control regions)
- [ ] Add caption + the learning objective on the page
- [ ] Set `status: done`
## p5.js sketch
```javascript
// MicroSim: Nervous system
let controls = {};
function setup() {
// createCanvas(...); create sliders for the parameters above.
}
function draw() {
// background(...); read controls; render wave animation; respond live.
}
```
---
Back to [[System]] · Wikipedia: [Nervous system](https://en.wikipedia.org/wiki/Nervous_system)
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<!-- SEMIOTIC-PROFILE:START -->
## Semiotic profile
> *The semiotic universals this article invokes, machine-derived from the crossref — **unverified** (born so). Populated 2026-07-06 for the Systems room.*
**Universals (8):** 🟡 system (30) · 🟡 information (6) · 🟢 signal (4) · 🟢 wave (4) · 🟢 emergence (2) · 🟢 feedback (2) · 🟢 equilibrium (1) · 🟢 flow (1)
**Enter by sign:** Systems Semiotic Gateway · Alphabetum · Icon Registry · ← Systems Portal
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## Wikipedia : Wikitube
**Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Nervous_system) : [Wikitube](https://en.wikitube.io/wiki/Nervous_system)
## Previous hub tags
Tree parents: [[Control_theory]] · [[Cybernetics]] · [[Operations_research]] · [[Reliability_engineering]] · [[System_dynamics]] · [[Systems_engineering]] · [[Systems_science]] · [[Systems_theory]].
Legacy hubs: none.
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*Sources: 2 legacy notes. Minted wave 1, 2026-07-30 (v1.6 order).*