Brain of cockroach formed by how many pair of gangalia
Answers
Three pairs of nerves originate from the supra-oesophageal ganglion—optic, antennary and labrofrontal nerves. The first two innervate the eyes and antennae but the third one divides into labral nerve supplying to the labrum and the frontal nerve which runs forwards to join the sympathetic nervous system.
Answer:There is, of course, good reason to view insect brains as primitive — at least quantitatively. Humans possess 100,000,000,000 brain cells. A cockroach has nearly 1,000,000 brain cells; a fruit fly, only 250,000. Still, insects exercise impressive information management: They pack neurons into their brains 10 times more densely than mammals do. They also use each brain cell more flexibly than mammals. Several far-flung tendrils of a single neuron can each act independently — boosting computing power without increasing the number of cells. Somehow that circuitry allows a honeybee, with barely a million neurons on board, to meander six miles from its hive, find food, and make a beeline directly home. Few humans could do the same even with a map and a compass.
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