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Property Organism Value Units ID Details
Number of neurons in the central nervous system of the common octopus and small mammals such as shrews Eukaryotes ~30,000,000 neurons 109131 Williams RW, Herrup K....
Fraction of white matter of central nervous system (CNS) that is myelin on a dry weight basis Mammals 50 - 60 % 114484 Hildebrand C, Remahl S...
Number of cells in larval nervous system Tunicate Ciona intestinalis 335 (±4) Unitless 105864 Nicol D, Meinertzhagen...
Predominance of Meningiomas (primary extra-axial tumors of the central nervous system (CNS)) in females Human Homo sapiens ~3:1 females:males 117050 Polyzoidis S, Koletsa T...
Conduction delays in the mammalian nervous system Mammals very short axons <100 µsec: very long non-myelinated central axons >100 ms N/A 110606 Harvey A. Swadlow and...
Diameter of myelinated and unmyelinated axons in central nervous system (CNS) (but size spectra of myelinated and unmyelinated axons overlap considerably) Metazoa animals myelinated 0.2: unmyelinated ≤0.8 µm 114487 Hildebrand C, Remahl S...
Recurrence of meningiomas (primary extra-axial tumors of central nervous system (CNS)) following total resection Human Homo sapiens 2 - 3 % 117052 Polyzoidis S, Koletsa T...
Fraction of genes in nervous system that are comprised by gap junctions Nematode Caenorhabditis elegans ~10 % 117156 Simonsen KT, Moerman DG...
Time for transduction of olfactory stimulus to nervous system Tiger salamander Ambystoma tigrinum ~150 msec 112580 Olofsson JK. Time to...
Fraction of tumors in different parts of the central nervous system (CNS) that are meningiomas (primary extra-axial tumors of CNS) Human Homo sapiens intracranial 15%: intraspinal 25%: primary CNS 28% % 117051 Polyzoidis S, Koletsa T...
Number of neurons and microglia in each body ganglia of the nervous system European medicinal leech Hirudo medicinalis neurons ~400: microglia ~10,000 N/A 114496 Biber K, Owens T, Boddeke...
Total length of the system of conduits which composes the vascular system Mammals ~60,000 miles 113045 Rosen, Optimality principles...
Volume of neuron soma, nucleus & nucleolus Guinea Pig Cavia porcellus cell body 12,260µm^3: nucleus 1,660µm^3: nucleolus 25.6µm^3 µm^3 112112 Edstrom JE. Effects of...
Average dimensions of neuronal soma of trigeminal mesencephalic nucleus in adult Syrian Hamster Mesocricetus auratus diameter 34.1µm: surface area 3,651µm^2: cytoplasmic volume 20,569µm^3 N/A 112113 Alley KE. Morphogenesis...
Glutamic acid concentration in identified isolated B1 neuron California sea hare Aplysia californica 1.7 (Table - link) μM 106605 Nemes P, Knolhoff AM...
Representative examples for glutamic acid and serine concentrations measured in identified isolated neurons from the A. californica CNS California sea hare Aplysia californica Table - link N/A 106604 Nemes P, Knolhoff AM...
Number of adult neural cells that form major neuropile substructures of the brain, such as the central complex, that are contributed by type II NBs (neuroblasts) Fruit fly Drosophila melanogaster ~5000 type II NBs (neuroblasts) 117237 Homem CC, Knoblich JA....
Number of cell types in normal, healthy adult Human Homo sapiens 411 Unitless 106155 Vickaryous MK, Hall BK....
The giant fiber system-afferent and efferent connections Arthropods Table - link N/A 110603 Theodore Holmes Bullock...
Fraction of all neurons that are produced in embryonic NB (neuroblast) divisions Fruit fly Drosophila melanogaster of larval central nervous system (CNS) 100%: of adult CNS 10% % of cells 117236 Homem CC, Knoblich JA....