Whole Nervous System
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| Name | Neurons in the brain/whole nervous system | Details | Image | Source |
|---|---|---|---|---|
| Sponge | 0 | |||
| Trichoplax | 0 | |||
| Caenorhabditis elegans (roundworm) | 302 | ~ 5,000 synapses | ||
| Medicinal leech | 10,000 | |||
| Pond snail | 11,000 | |||
| Sea slug | 18,000 | |||
| Fruit fly | 100,000 | ~ 107 synapses | ||
| Lobster | 100,000 | |||
| Ant | 250,000 | Varies per species | ||
| Honey bee | 960,000 | ~ 109 synapses | ||
| Cockroach | 1,000,000 | |||
| Frog | 16,000,000 | |||
| Mouse | 75,000,000 | ~ 1011 synapses | ||
| Rat | 56,000,000 | 448 × 109 | ||
| Octopus | 300,000,000 | |||
| Cat | 1,000,000,000 | 1012–1013 synapses | ||
| Common Chimpanzee | 6,700,000,000 | |||
| Elephant | 23,000,000,000 | |||
| Human | 85,000,000,000 | For average adult; 1014–1015 synapses |
Read more about this topic: List Of Animals By Number Of Neurons
Famous quotes containing the words nervous system, nervous and/or system:
“A two-week-old infant cries an average of one and a half hours every day. This increases to approximately three hours per day when the child is about six weeks old. By the time children are twelve weeks old, their daily crying has decreased dramatically and averages less than one hour. This same basic pattern of crying is present among children from a wide range of cultures throughout the world. It appears to be wired into the nervous system of our species.”
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—Christine H. B. Grant, U.S. university athletic director. As quoted in the Chronicle of Higher Education, p. A42 (May 12, 1993)