La pesca la caza el descanso en rossii

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It controls the mouthparts, the salivary glands and certain muscles. Grey matter is found in clusters of neurons in the brain and La pesca la caza el descanso en rossii cord, and in cortical layers that line their surfaces. The head segment contains the brain, also known as the supraesophageal ganglion. White matter includes all of the nerves, and much of the interior of the brain and spinal cord. Nerves that exit from the cranium are called cranial nerves while those exiting from the spinal cord are called spinal nerves. 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. Typically, each body segment has one ganglion on each side, though some ganglia are fused to form the brain and other large ganglia.

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The enteric nervous system functions to control the gastrointestinal system. Nervous tissue first arose in wormlike organisms about to million years ago. In insects, many neurons have cell bodies that are positioned at the edge of the brain and are electrically passive—the cell bodies serve only to provide metabolic support and do not participate in signalling. The neurons that give rise to nerves do not La pesca la caza el descanso en rossii entirely within the nerves themselves—their cell bodies reside within the brain, spinal cord, or peripheral ganglia Glial cells named from the Greek for "glue" are non-neuronal cells that provide support and nutrition, maintain homeostasis, form myelin, and participate in signal transmission in the nervous system. The sympathetic nervous system is activated in cases of emergencies to mobilize energy, while the parasympathetic nervous system is activated when organisms are in a relaxed state. The CNS contains the brain and spinal cord. In the human brain, it is estimated that the La pesca la caza el descanso en rossii number of glia roughly equals the number of neurons, although the proportions vary in different brain areas.

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Typically, each body segment has one ganglion on each side, though some ganglia are fused to form the brain and other large ganglia. Many arthropods have well-developed sensory organs, including compound eyes for vision and antennae for olfaction and pheromone sensation. The sensory information from these organs is processed by the brain. Both autonomic La pesca la caza el descanso en rossii enteric nervous systems function involuntarily. The autonomic nervous system is further subdivided into the sympathetic and the parasympathetic nervous systems. The nervous system derives its name from nerves, which are cylindrical bundles of fibers the axons of neuronsthat emanate from the brain and spinal cord, and branch repeatedly to innervate every part of the body.

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The sensory information from these organs is processed by the brain. 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. The PNS is divided into La pesca la caza el descanso en rossii somatic and b autonomic nervous system, and c the enteric nervous system. Many arthropods have well-developed sensory organs, including compound eyes for vision and antennae for olfaction and pheromone sensation. A very important type of glial cell oligodendrocytes in the central nervous system, and Schwann cells in the peripheral nervous system generates layers of a fatty substance called myelin that wraps around axons and provides electrical insulation which allows them to transmit La pesca la caza el descanso en rossii potentials much more rapidly and efficiently. Grey matter is found in clusters of neurons in the brain and spinal cord, and in cortical layers that line their surfaces.

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