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Schwann cells or neurolemmocytes (named after German physiologist Theodor Schwann) are the principal glia of the peripheral nervous system (PNS). Glial cells function to support neurons and in the PNS, also include satellite cells, olfactory ensheathing cells, enteric glia and glia that reside at sensory nerve endings, such as the Pacinian corpuscle.
Neurilemma (also known as neurolemma, sheath of Schwann, or Schwann's sheath) [1] is the outermost nucleated cytoplasmic layer of Schwann cells (also called neurilemmocytes) that surrounds the axon of the neuron. It forms the outermost layer of the nerve fiber in the peripheral nervous system. [2]
Theodor Schwann (German pronunciation: [ˈteːodoːɐ̯ ˈʃvan]; [1] [2] 7 December 1810 – 11 January 1882) was a German physician and physiologist. [3] His most significant contribution to biology is considered to be the extension of cell theory to animals.
Glial cells known as astrocytes enlarge and proliferate to form a scar and produce inhibitory molecules that inhibit regrowth of a damaged or severed axon. In the peripheral nervous system (PNS), glial cells known as Schwann cells (or also as neuri-lemmocytes) promote repair. After axonal injury, Schwann cells regress to an earlier ...
The cell is the fundamental unit of structure and function in all living organisms. [14] The activity of an organism depends on the total activity of independent cells. [15] Energy flow (metabolism and biochemistry) occurs within cells. Cells contain DNA which is found specifically in the chromosome and RNA found in the cell nucleus and ...
The nonmyelinating Schwann cells are a subgroup of the Schwann cells characterized by not forming myelin. [1]The group of nonmyelinating Schwann cells includes the terminal Schwann cells, present at neuromuscular junctions, the Schwann cells of Remak fibers (also called Remak Schwann cells) and the Schwann cells associated to sensory structures, like tactile corpuscles and lamellar corpuscles.
Thus, Schleiden and Schwann became the first to formulate what was then an informal belief as a principle of biology equal in importance to the atomic theory of chemistry. He also recognized the importance of the cell nucleus, discovered in 1831 by the Scottish botanist Robert Brown, [6] and sensed its connection with cell division. In 1838 ...
A labelled diagram of a neurone, with optional label, and links to all labelled components. Template parameters [Edit template data] Parameter Description Type Status Label 1 The secondary heading, if any. Content suggested This template has not been added to any categories. Please help out by adding categories to it so that it can be listed with similar templates. The above documentation is ...