Explain the structure and function of nervous tissue in plant in hindi plz ..
Answers
Human Nervous System: Function and Types!
1. Sensory input, that is, the detection of stimuli by the receptors, or sense organs (e.g., eyes, ears, skin, nose and tongue).
2. Transmission of this input by nerve impulses to the brain and spinal cord, which generate an appropriate response.
3. Motor output, that is, carrying out of the response by muscles or glands,which are called effectors.
Two types of cells constitute the nervous system— neurons and neuroglia. The neurons conduct impulses and the neuroglia support and protect the neurons. A neuron consists of a cell body called cyton, and two types of processes—dendrite and axon.
Dendrites or Dendron’s:
These are hair like processes connected to the cyton. They receive stimulus, which may be physical, chemical, mechanical or electrical, and pass it on to the cyton.
Cyton:
It is the cell body, with a central nucleus surrounded by cytoplasm.
Axon:
From one side of the cyton arises a cylindrical process filled with cytoplasm. This process is called axon. It is the longest part of the neuron. It transmits impulse away from the cyton. Its tip has a swelling called axon bulb. Generally, a neuron has one axon.
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