what are the nerve plexuses?
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A nerve plexus is a network of intersecting nerves; multiple nerve plexuses exist in the body. Nerve plexuses are composed of afferent and efferent fibers that arise from the merging of the anterior rami of spinal nerves and blood vessels.
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Within a nerve, each axon is surrounded by a layer of connective tissue called the endoneurium. The axons are bundled together into groups called fascicles, and each fascicle is wrapped in a layer of connective tissue called the perineurium.
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The organs of the peripheral nervous system are the nerves and ganglia. ... The peripheral nervous system is further subdivided into an afferent (sensory) division and an efferent (motor) division. The afferent or sensory division transmits impulses from peripheral organs to the CNS.
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SOMATIC NERVOUS SYSTEM (SNS) OF THE PNS (PERIPHERAL NERVOUS SYSTEM) CONSISTS OF: SENSORY NEURONS, CALLED SOMATIC SENSORY NEURONS, THAT CONVEY INFORMATION FROM SENSORY RECEPTORS IN THE SKIN, SKELETAL MUSCLES, JOINGS, AND FOR THE SPECIAL SENSES (VISION, HEARING, TASTE, AND SMELL) TO THE CNS.
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The axons are bundled together into groups called fascicles. Each fascicle is wrapped in a layer of connective tissue called the perineurium.
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Axon and Dendrites are the two important parts of nerve cells involved in the conduction of nerve impulses. Dendrites are the branched projections from the neurons. Axon, better called as nerve fibres, are also cytoplasmic projections from the neurons.
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Nerve cells are not limited to the brain. They exist throughout the central nervous system (CNS: including brain and spinal cord) as well as the peripheral nervous system (sensory and motor neurons) which 'starts' but extends 'outward' from the spinal cord to our internal organs, limbs, etc.
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Neuron. Neurons (also known as neurones, nerve cells and nerve fibers) are electrically excitable cells in the nervous system that function to process and transmit information. In vertebrate animals, neurons are the core components of the brain, spinal cord and peripheral nerves.
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The peripheral nervous system consists of all neurons that exist outside the brain and spinal cord. This includes long nerve fibers as well as ganglia made of neural cell bodies. The peripheral nervous system connects the central nervous system (CNS) to various parts of the body.
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Answer: Explanation: Peripheral nervous system : The portion of the nervous system that is outside brain and spinal cord . the nerves is is the peripheral nervous system is directly connect the central nervous system to sense organs like, eye,ear,skin;.
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The solar plexus — also called the celiac plexus — is a complex system of radiating nerves and ganglia. It's found in the pit of the stomach in front of the aorta.
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Nerves. The nerves arising from the lumbar plexus from superior to inferior are iliohypogastric, ilioinguinal, genitofemoral, lateral femoral cutaneous, femoral nerve, obturator, and nerve to the lumbosacral trunk. The iliohypogastric nerve is created from spinal levels T12 and L1.
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The peripheral nervous system refers to parts of the nervous system outside the brain and spinal cord. It includes the cranial nerves, spinal nerves and their roots and branches, peripheral nerves, and neuromuscular junctions.
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Axons are the primary transmission lines of the nervous system, and as bundles they form nerves. Some axons can extend up to one meter or more while others extend as little as one millimeter.
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A nerve consists of many structures including axons, glycocalyx, endoneurial fluid, endoneurium, perineurium, and epineurium. The axons are bundled together into groups called fascicles, and each fascicle is wrapped in a layer of connective tissue called the perineurium.
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In human nervous system: Sympathetic nervous system. … sometimes referred to as the thoracolumbar outflow.) The axons of these neurons exit the spinal cord in the ventral roots and then synapse on either sympathetic ganglion cells or specialized cells in the adrenal gland called chromaffin cells.
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Neurons, or nerve cells that carry nerve impulses, are made up of the cell body, the axon, and several dendrites. Signals move across the synapse, the place where the axon of one neuron meets the dendrite of another, using chemicals called neurotransmitters.