stem cell (English) [ IPA: ˈstem ˈsel ASM: ষ্টেম চেল]
Contributed by: Pankaj Borah (পঙ্কজ বৰা) on 2008-09-18
1. Medical Science(Common Noun-Common) An unspecialized cell that gives rise to a specific specialized cell, such as a blood cell. Cells that have the ability to self-replicate and give rise to specialized cells. Stem cells can be found at different stages of fetal development and are present in a wide range of adult tissues. Many of the terms used to distinguish stem cells are based on their origins and the cell types of their progeny.There are three basic types of stem cells. Totipotent stem cells, meaning their potential is total, have the capacity to give rise to every cell type of the body and to form an entire organism. Pluripotent stem cells, such as embryonic stem cells, are capable of generating virtually all cell types of the body but are unable to form a functioning organism. Multipotent stem cells can give rise only to a limited number of cell types. For example, adult stem cells, also called organ- or tissue-specific stem cells, are multipotent stem cells found in specialized organs and tissues after birth. Their primary function is to replenish cells lost from normal turnover or disease in the specific organs and tissues in which they are found. এবিধ অবিশিষ্ট কোষ যি বিশেষ ধৰণৰ কোষ, কলা বা অংগ সৃষ্টি কৰিব পাৰে |