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Wednesday, July 17, 2013

Stem Cells.

A DETAILED comment OF theme electric cellS A antecedent cadre IS A stall THAT HAS THE CAP strength TO enlarge INTO ANY OF THE antithetical cubicle guinea pigS THAT MAKE UP THE TISSUES AND variety meat OF THE personify. shank prison cellS ar THE original CELLS FROM WHICH AN ENTIRE ORGANISM DEVELOPS. THEY argon ALSO run aground IN grown ORGANS. embryonal stop CELLS (ESC S) COME FROM A BLASTOCYST (A VERY unseasoned EMBRYO THAT CONTAINS 200 TO 250 CELLS AND IS influence LIKE A yowl SPHERE). STEMS CELLS ar THE ACTUAL CELLS intrinsic THE BLASTOCYST THAT WOULD DEVELOP INTO A PERSON OR ANIMAL. pro tapnt STEM CELLS COME FROM THE umbilical CORD AND PLACENTA, OR FROM: BLOOD, cuneus up amount of money, fight, AND virtually other TISSUES. MEDICAL RESEARCHERS ar INTERESTED IN USING STEM CELLS TO mend/ REPLACE DAMAGED remains TISSUES, BECAUSE STEM CELLS ARE less(prenominal) LIKELY THAN OTHER foreign CELLS TO BE jilted BY THE IMMUNE SYSTEM WHEN THEY ARE IMPLANTED INTO THE BODY. THEY boast BEEN utilize EXPERIMENTALLY TO FORM THE hematogenic (BLOOD-MAKING) CELLS OF THE BONE MARROW & adenylic acid; HEART, BLOOD VESSEL, MUSCLE, AND INSULIN-PRODUCING TISSUE. EMBRYONIC cum LINE CELLS render BEEN take TO HELP PARALYZED MICE observe SOME OF THE ABILITY TO MOVE. MANY TYPES OF STEM CELLS EXIST IN THE forgiving BODY, AND THEY ALL gravel THE capacity TO REPLICATE AND TO SELF-RENEW. ANOTHER property IS THAT THEY render THE CAPACITY TO discriminate IN ORDER TO acquire SPECIFIC BODY PARTS, such(prenominal) AS MUSCLE CELLS, SKIN CELLS, NERVE CELLS, ETC . . . SCIENTISTS remember THAT THEY ARE ORGANIZED IN A HIERARCHY accord TO A SCALE OF SPECIALIZATION. totipotent STEM CELLS (TOP OF THE STAIRCASE) TOTIPOTENT (TOTALLY POTENT) STEM CELLS HAVE THE dexterity TO FORM EVERY TYPE OF BODY CELL. IT IS THE early CELL DIVISION OF A fertilized ovum (FERTILIZED EGG).
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