Nervous System

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Nervous System

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Is the master control and communication system of the body.

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Sensory Input

Integration

Motor Output

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3 Overlapping Functions of Nervous System.

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Central Nervous System

Peripheral Nervous System

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2 Types of Nervous System

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Central Nervous System

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It is consist of the brain and the spinal cord. Interpret incoming sensory information.

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Peripheral Nervous System

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It is consist of the cranial and spinal nerves.

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Spinal Nerves

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Carry impulses to and from the spinal cord.

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Cranial Nerves

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Carry impulses to and from the brain.

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Sensory Division (afferent)Motor Division (efferent)

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Functional Classification of PNS Structure

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Sensory Division

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Consist of nerves that convey impulses to the central nervous system from sensory receptors located in various parts of the body.

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Motor Division

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Carries impulses from the CNS to effector organs, the muscles and the glands.

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Somatic Nervous System

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Also known as the Voluntary Nervous system. Allows us to consciously or voluntarily control our skeletal muscles.

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Autonomic Nervous System

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Also know as the involuntary nervous system. Regulates involuntary events such as the activity of smooth muscle, cardiac muscle and glands.

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Neuroglia

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Nerve glue, also known as glial cells or glia.

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Astrocytes

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Abundant star-shaped cells that account for nearly half of neural tissue.

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Microglia

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Spiderlike phagocytes that monitor the health of nearby neurons and dispose of debris, such as dead brain cells and bacteria.

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Ependymal Cells

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Neuroglia that line the central cavities of the brain and the spinal cord.

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Oligodendrocytes

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Neuroglia that wrap their flat extensions tightly around the nerve fibers.

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Myelin Sheaths

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Fatty insulting coverings. Product of oligodendrocytes..

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Gliomas

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Tumors formed by neuroglia

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Schwann Cells

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It forms the myelin sheaths around nerve fibers in the PNS.

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Satellite Cells

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It acts as the protective, cushioning cells for peripheral neuron cell bodies.