NERVOUS TISSUE.pptx

NERVOUS TISSUE

1. NERVOUS TISSUE By: Dr Sarita Sharma Associate Professor MMCP, MMDU

2. Nervous tissue found in brain , spinal cord and nerves and is responsible for communication. There are two main cells that make nervous tissue Neurons :- Excitable cells Neuroglia :- Non excitable cells

3. 1. NEURONS:- Neurons are responsible for sending and receiving massages. 2. Neuroglia :- Neuroglia provied support and nutrient for neurons.

4. NEURONS for processing , transfer and storage of information. Neurons are sensitive to various stimuli It converts stimuli into electrical signals called nerve action potential. And it conduct these action potential to other neurons , to muscle tissue or to glands

5. Most neurons consist of A cell body to kinds of cell processes such as: Dendrites and Axons.

6. A cell body A cell body contains nucleus and others organelles DENDRITES :- Are tapering , highly branched and usually short cell processes ( extensions ). They are the major receiving and input portion of neuron. AXON :- the axon of a neuron is a singal thin cylindrical process that may be very long . It is the output portion of a neuron, conducting nerve impulses toward another neuron or to some other tissue.

7. NEUROGLIA For support , regulation and protection of neurons CNS neuroglia : astrocytes oligodendrocytes microglia ependymal cells

8. PNS neuroglia : Schwann cells ( neurolemmocytes ) satellite cells