For example, in the cerebral cortex.īipolar Neurons- They are the ones with one axon and one dendrite. Multipolar Neurons - Several processes arise in them, having one axon and many dendrites. The interruption between the two-adjacent myelin sheath is known as Nodes of Ranvier. The cells of the axon which produce and cover the myelin sheath are known as Schwann cells. Each of the axons ends into a bulb-like structure known as the synaptic knob, which contains neurotransmitters. Axon is a long, single structure whose distal end is branched. Dendrites carry nerve impulses towards or into the cell body. Short, several, finger-like projections that arise from the cell body are called dendrites. The cell body is made up of cytoplasm that contains granular bodies called Nissl’s granules. The classification of the autonomic nervous system is done into two types-Ī neuron is the structural and functional unit of the nervous system. Impulses are transmitted from the CNS to skeletal muscles in the somatic nervous system while the autonomic nervous system innervates cardiac and smooth muscles of the glands which transmit the impulses from the CNS to the involuntary part of the body. Impulses are carried from organs/tissues to the CNS in Afferent nerve fibers whereas, in efferent nerve fibers, impulses are transmitted from CNS to the target tissue/organ.

(b) efferent nerve fibers or motor nerve fiber (a) afferent nerve fibers or sensory nerve fiber

The two types of nerve fibers present in PNS are. The brain and Spinal cord are the 2 parts of the Central nervous system whereas the peripheral nervous system is composed of all the nerves present in the brain and the spinal cord. The classification of the nervous system is done into two types. They can detect, receive, and transmit stimuli. The structural and functional units of the neural system are known as neurons.

The interaction of two or more organs among each other and to complement each other’s function is known as coordination.

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