Fusiform cell
As fusiform cell or stem cell (of lat . Fusus "spindle" and size "form") was generally pure and morphologically denotes a spindle or lancet-shaped cell with pointed ends.
anatomy
In the nervous system , these are spindle-shaped nerve cells with polarized expansion of the dendrites and usually a rather short axon (i.e. cytoplasmic processes ). The so-called fusimotoneurons , which are gamma motor neurons on the anterior horn of the spinal cord , which innervate the muscle fibers located in muscle spindles (intrafusal), form a special class . They are collectively referred to as the fusimotor system .
Fibrocytes are also called spindle cells.
pathology
In pathology , bipolar, strongly tapered cells with a relatively large nucleus are generally called that. They are found in spindle cell carcinoma (carcinoma fusicellulare) and in benign juvenile spindle cell nevus ( melanoma ), as well as in spindle cell sarcoma and in spindle cell lipoma . Spindle cells are also typical for other tumors.
plants
Fusiform cells can be several hundred times longer than their radial width.
Fusiform cells also occur as one of two major cell types in the cambium ; there the cells are also referred to as initials . From them emerge the elements of the xylem and phloem , as well as all other cells arranged parallel to the organ axis.
Individual evidence
- ↑ Link to Wissenschaft-online.de
- ^ Roche Lexicon Medicine. 5th edition. Urban & Fischer, Munich 2003, ISBN 3-437-15156-8 , pp. 656, 1733.
- ↑ Ray F. Evert (author), Rosemarie Langenfeld-Heyser (ed.): Esau's plant anatomy: meristems, cells and tissues of plants - their structure, function and development. 1st edition. De Gruyter, 2009, ISBN 978-3-11-020592-3 , p. 313.
- ↑ Meristeme - Article of the University of Hamburg
- ^ Murray W. Nabors (author), Renate Scheibe (ed.): Botany. Bafög issue. Pearson Studium, 2007, ISBN 978-3-86894-040-4 , p. 126.