Question

What are the types of nervous tissues?

Answer 1

Nervous tissue consists of two main types of cells: neurons and neuroglia.
Nerve cells or neurons transmit nerve impulses that carry information around the body.
Neuroglia are also known as "glia" and have various functions in support of nerve cells but do not transmit nerve impulses themselves.

There are two main categories of nerve tissue: that found in the central nervous system and that in the peripheral nervous system. The central nervous system is made up of tissue found in the brain and spinal cord while the peripheral nervous system contains nerve cells, fibers, and ganglia located elsewhere in the body.

In the Central Nervous System:
1. Grey matter is composed of cell bodies, dendrites, unmyelinated axons, protoplasmic astrocytes, satellite oligodendrocytes (non-myelinating oligodendrocyte subtype), microglia, and very few myelinated axons.

2. White matter is composed of myelinated axons, fibrous astrocytes, myelinating oligodendrocytes, and microglia.

In the Peripheral Nervous System:
1. Ganglion tissue is composed of cell bodies, dendrites, and satellite glial cells.

2. Nerves are composed of myelinated and unmyelinated axons, Schwann cells surrounded by connective tissue.