Nerve Tissues
Nerve tissues consist of two types of cells, nerve cells and neuralgia cells. The nerve cell is a basic structural and functional unit of the nervous system, also called a neuron. The neuron is the cell with processes. The neuronal cell body is located in the grey substance of the central nervous system, nuclei which are an island of grey substances and the ganglion in the pqripheral nervous system. The processses form the white substances in the central nervous system and nerves in periphery nervous system.
Neurons can be classified into motor neurons, sensory neurons and interneurons which connects other neurons. The main function of neurons is receiving the stimuli and conducting nerve impulses. The basic regulation action of the nervous system is in the form of reflex.
Nerve fibers are mainly formed by long processes of neurons. The' function of nerve fibres is to conduct excitation or action potential traveling in the nerve fibres, which is called nerve impulses. The nervous system can regulate the function of other organs, and meanwhile supply nutrients to them. For example, if a patient has the disease of poliomyelitis, his motor neurons in the anterior horn of the spinal cord will be infected by the virus and lose their functions, resulting in the atrophy of the skeletal muscles which are controlled by the nerves.
Glia cells are nonconducting cells without the function of producing and conducting excitation. They spread among neurons to exert the functions of supporting, nourishing, protecting, insulating and repairing the neurons.
Nerve TissuesNerve tissues consist of two types of cells, nerve cells and neuralgia cells. The nerve cell is a basic structural and functional unit of the nervous system, also called a neuron. The neuron is the cell with processes. The neuronal cell body is located in the grey substance of the central nervous system, nuclei which are an island of grey substances and the ganglion in the pqripheral nervous system. The processses form the white substances in the central nervous system and nerves in periphery nervous system.Neurons can be classified into motor neurons, sensory neurons and interneurons which connects other neurons. The main function of neurons is receiving the stimuli and conducting nerve impulses. The basic regulation action of the nervous system is in the form of reflex.Nerve fibers are mainly formed by long processes of neurons. The' function of nerve fibres is to conduct excitation or action potential traveling in the nerve fibres, which is called nerve impulses. The nervous system can regulate the function of other organs, and meanwhile supply nutrients to them. For example, if a patient has the disease of poliomyelitis, his motor neurons in the anterior horn of the spinal cord will be infected by the virus and lose their functions, resulting in the atrophy of the skeletal muscles which are controlled by the nerves.Glia cells are nonconducting cells without the function of producing and conducting excitation. They spread among neurons to exert the functions of supporting, nourishing, protecting, insulating and repairing the neurons.
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