NERVOUS TISSUE

NERVOUS TISSUE

• They are highly specialized tissue due to which the animals are table to perceive and respond to the stimuli.
• Their functional unit is called as never cell or neuron.
• Cell body is cyton covered by plasma membrane.
• Short, hair like extensions siring from cyton are dendron which are future subdivide into dendrites.
• Axon is long, tail like cylindrical process with fine branches at the end. Axon is covered by a sheath.
• Axon one neuron is very closely placed to the dendrons of another neuron to carry impulses from one to another neuron in the from of electrochemical waves. This close proximity is called as synapse

A neuron

Function of Nervous Tissue

Though all cells possess the ability to respond to change in environment (stimulus), but the Cells of Nervous tissue receive and transmit stimulus very rapidly from sense organs to brain and spinal cord in the form of impulses. This message is interpreted by the brain and spinal cord and the message for response is transmitted to the organs. The functional combination of nerve and muscle tissue enables multicellular animals to move rapidly in response to stimuli.