Nervous Tissue
Nervous tissue is composed of two primary cell types: neurons and glial cells. Neurons are electrically active cells responsible for computation and communication within the nervous system, releasing chemical signals to target cells. Glial cells, on the other hand, provide support and maintenance functions, including insulation, nutrition, and waste removal.
Nervous tissue can be divided into two systems: the Central Nervous System (CNS) and the Peripheral Nervous System (PNS). The CNS consists of the brain and spinal cord, while the PNS comprises branching peripheral nerves. The CNS is responsible for integrating and processing information, whereas the PNS transmits signals between the CNS and the rest of the body.
In the CNS, four types of neuroglial cells are found: astrocytes, microglial cells, ependymal cells, and oligodendrocytes. These cells play crucial roles in maintaining the environment for neurons, removing waste, and providing insulation for axons. In the PNS, satellite glial cells and Schwann cells perform similar functions.
Nervous tissue, also known as neural tissue, is responsible for regulating and controlling various bodily functions and activities. It enables sensation, movement, emotions, communication, thought processing, and memory, making it essential for overall bodily function and well-being.