What are the nerve tissue?
Nervous tissue is found in the brain, spinal cord, and nerves. It is responsible for coordinating and controlling many body activities. The cells in nervous tissue that generate and conduct impulses are called neurons or nerve cells. These cells have three principal parts: the dendrites, the cell body, and one axon.
What is nervous tissue Ncert?
What is a Nervous Tissue? Nervous or the nerve tissue is the main tissue of our nervous system. It monitors and regulates the functions of the body. Nervous tissue consists of two cells: nerve cells or neurons and glial cells, which helps transmit nerve impulses and also provides nutrients to neurons.
What is the main cell of the nervous tissue?
neuron
Although the nervous system is very complex, there are only two main types of cells in nerve tissue. The actual nerve cell is the neuron. It is the “conducting” cell that transmits impulses and the structural unit of the nervous system. The other type of cell is neuroglia, or glial, cell.
What is nervous tissue class 9 Ncert?
They are highly specialised for being stimulated and then transmitting the stimulus very rapidly from one place to another. Brain,spinal cord,nerves are made up of nervous tissue. Nervous tissue contain unit cell called nerve cell or neurons. The impulses travel one one neuron to another neuron.
What is a nerve class 9?
A nerve is a cable-like structure within the body designed to conduct nerve impulses that relay information from one part of the body to another. These nerves transmit information along the axons to the respective organs. These are the basic elements that constitute a nerve. Nerves are a part of the nervous system.
What is tissue with diagram?
Tissues are groups of cells that have a similar structure and act together to perform a specific function. The word tissue comes from a form of an old French verb meaning “to weave”. Groups of tissues make up organs in the body such as the brain and heart.
What is the function of nerves?
A nerve is a bundle of fibers that receives and sends messages between the body and the brain. The messages are sent by chemical and electrical changes in the cells, technically called neurons, that make up the nerves.
What is nervous tissue?
Man Bahadur Paudyal 2. Objective • To describe the nervous tissue • To describe the compnent of nervous tissue. 3. NERVOUS TISSUE • Nervous tissue Consists of:- Neuron Supporting cells (neuroglia) Nervous system 1. central nervous system:- brain and spinal cord 2. peripheral nervous system:- cranial and spinal nerve.
What are the connective tissues of nerve fibers?
CONNECTIVE TISSUE INVESTMENTS OF NERVES • Epineureum – Dense collagenous Con. Tissue with thick elastic fiber – Prevent damage by overstreching • Perineureum – Dense con. Tissue – Layers of epithelioids – Isolates neural environment (blood-nerve barrier) • Endoneureum – Loose con. Tissue – Regulation of microenvironment of nerve fiber 1607/12/2012
What are the characteristics of nuclei of nerve cells?
•Nuclei of nerve cells are: large, round and euchromatic with a single prominent nucleolus. •Centrioles- absent. •Cytoplasm of nerve cell bodies is abundantly supplied with: – masses of RER ,numerous Golgi bodies, lysosomes Cell body (perikaryon or soma)
What is peripheral nerve?
Peripheral nerve •Afferent and efferent nerve fiber •1or more bundle (fascicles) of nerve fibers Within fascicle, each nerve fibers with its investing schwann cell:- endoneurium Each fascicle is surrounded — tough Collagenous tissue with flat epithlial Cell– perineurium If >1 fascicles, further layer of loose collagenous tissue – epineurium. 16.