List of animals by number of neurons

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This is a list of animals by number of neurons in their brain. These numbers are estimations derived by multiplying the density of neurons in a particular animal by the average weight or mass of the animal's brain

[edit] Overview

Neurons are the cells in the brain which transmit information to and from body parts. In the simplest organisms, they act only to drive the organism to respond to certain stimuli. In higher organisms, reasoning abilities come into play and we can see animals working collectively to achieve a similar goal. Not all animals have neurons; Trichoplax and sponges lack nerve cells altogether.

The number of neurons and their relative abundance in different parts of the brain is a determinant of neural function and, consequently, of behavior.

[edit] Sortable list

Name	Neurons	Details	Source
Ant	10,000	Varies per species, in reality:10,000-100,000	[1]
C. elegans	302		[2]
Cat	200,000,000		[3]
Cockroach	1,000,000		[4]
Frog	16,000,000		[5]
Fruit fly	100,000		[6]
Honey Bee	850,000		[7]
Human	100,000,000,000	Adult	[8]
Octopus	300,000,000		[9]
Pond snail	11,000		[10]
Rat	21,000,000		[11]
Sea slug	7,000		[12]
Trichoplax	0		[13]
Elephants and Whales	200,000,000,000		[14]
Zebrafish	10,000		[15]

[edit] References