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Nervous tissue, also called neural tissue, is the main tissue component of the nervous system.The nervous system regulates and controls body functions and activity. It consists of two parts: the central nervous system (CNS) comprising the brain and spinal cord, and the peripheral nervous system (PNS) comprising the branching peripheral nerves.
The cells in nervous tissue are densely packed and little information on their structures and interconnections can be obtained if all the cells are stained. Furthermore, the thin filamentary extensions of neural cells, including the axon and the dendrites of neurons, are too slender and transparent to be seen with normal staining techniques ...
The study of tissues is known as histology or, in connection with disease, as histopathology. ... The nervous tissue is derived from the ectoderm. Epithelial tissues
Histology image: 04104loa – Histology Learning System at Boston University—"Nervous Tissue and Neuromuscular Junction: spinal cord, cell bodies of anterior horn cells" Neuropil—Cell Centered Database; Histology image: 3_08 at the University of Oklahoma Health Sciences Center
These are nervous tissue cells with simple columnar shape, much like that of some mucosal epithelial cells. [2] Early monociliated ependymal cells are differentiated to multiciliated ependymal cells for their function in circulating cerebrospinal fluid. [3]
There are four basic types of animal tissues: muscle tissue, nervous tissue, connective tissue, and epithelial tissue. [5] [9] All animal tissues are considered to be subtypes of these four principal tissue types (for example, blood is classified as connective tissue, since the blood cells are suspended in an extracellular matrix, the plasma). [9]
Formation of the neuroectoderm is the first step in the development of the nervous system. [1] The neuroectoderm receives bone morphogenetic protein-inhibiting signals from proteins such as noggin, which leads to the development of the nervous system from this tissue. Histologically, these cells are classified as pseudostratified columnar cells.
The endoneurium (also called endoneurial channel, endoneurial sheath, endoneurial tube, or Henle's sheath) is a layer of delicate connective tissue around the myelin sheath of each myelinated nerve fiber in the peripheral nervous system. [1] Its component cells are called endoneurial cells. [2]