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In vertebrate species it consists of two main parts, the central nervous system (CNS) and the peripheral nervous system (PNS). The PNS consists mainly of nerves, which are enclosed bundles of the long fibers or axons, that connect the CNS to every other part of the body.
Nerves that transmit signals from the brain are called motor or efferent nerves, while those nerves that transmit information from the body to the CNS are called sensory or afferent.
So far, within the Jurassic period of Krakow and Czestochowa merely a few similar sites have been discovered.
They are likely to be the material trace of Scythian armies’ march through the Upland” – says dr Wojenka.
The Scyths were warlike people whom Herodotus described in ”The Histories”.
In the middle of the first millennium BC they set out from the steppes of the Black Sea for predatory expeditions that reached Central Europe and even as far as the borders of Egypt.
Moreover, under the cobblestone the archeologists came upon an unexpected relic – a Scythian 3,7cm long arrowhead which is estimated to come from the 6th century BC.
It was in the decade of 1990 that molecular mechanisms of behavioral phenomena became widely known (Eric Richard Kandel)." A microscopic examination shows that nerves consist primarily of axons, along with different membranes that wrap around them and segregate them into fascicles.
Both autonomic and enteric nervous systems function involuntarily.
Nerves that exit from the cranium are called cranial nerves while those exiting from the spinal cord are called spinal nerves.
The most interesting ones are a Polish coin from 1767, bronze hooks and eyes, a thimble, iron knives and marbles.
Antiques coming from the Middle Ages period are represented by fragments of vessels pottery and single metal objects.