Stem cells are unspecialized cells that have the potential to develop into any type of cell in the body. They are essential for growth, تطوير, and repair. Stem cells can be found in many different parts of the body, بما في ذلك نخاع العظام, الحبل السري, and adipose tissue.
The Origin of Stem Cells
Stem cells are derived from the inner cell mass of a blastocyst, which is a hollow ball of cells that forms during the early stages of embryonic development. The inner cell mass gives rise to all of the tissues and organs of the body.
Sources of Stem Cells
There are two main types of stem cells: الخلايا الجذعية الجنينية والخلايا الجذعية البالغة.
- الخلايا الجذعية الجنينية are derived from the inner cell mass of a blastocyst. They are pluripotent, which means that they have the potential to develop into any type of cell in the body.
- الخلايا الجذعية البالغة are found in many different tissues and organs of the body. هم متعددون, which means that they have the potential to develop into a limited number of cell types.
Stem cells are a valuable source of new cells for transplantation and regenerative medicine. They have the potential to be used to treat a wide range of diseases and conditions, including cancer, مرض قلبي, وإصابات الحبل الشوكي.