Blast Blastema Blastoma Blastula

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~ BLAST     vern for EXPLOSION  
            gr   BLASTOS = GERM  
            ply> | GERMINATION OFTEN IS EXPLOSIVE |
            consider  BRYO~  BRIO~ and APRIL 
~ BLAST~    prefix to denote ORIGIN or BUD SPROUT GERM as in
            BLASTODERM or
~ ~BLAST    suffix
            biol> implies IMMATURE CELL as in OSTEOBLAST
~ BLASTEMA  in gr = SHOOT  SPROUT  BUD  
            biol> GROUP OF PRIMITIVE CELLS
~ BLASTOMA  med> NEOPLASM OF EMBRYONIC CELLS
~ BLASTOS   in gr = TO SPROUT
            ply> | A BLASTING EMBRYO BLASTS TISSUES
                   TO CARVE A BLASTOCYST |
~ BLASTULA  or BLASTOSPHERE            sug> BALL  SPHERE
            med> SPHERICAL HOLLOW EMBRYONIC STAGE WITH
  A LAYER OF CELLS or BLASTODERM and a CAVITY or
  BLASTOCELE or BLASTOCOELE  the previous stage is a
  SOLID SPHERE resembling a MULBERRY or MORULA  
  THE BLASTODERM EVOLVES INTO THE
  TROPHOBLAST a                    gr TROPHE = NUTRITION
  LAYER OF EXTRAEMBRYONIC ECTODERMAL TISSUE ON
  THE OUTSIDE OF THE BLASTOCYST WHICH ATTACHES
  THE OVUM TO THE UTERINE WALL             sug> PLACENTA
  FROM THIS TISSUE WILL ARISE THE CHORION AND AMNION
  THE INNER CELLULAR LAYER THAT WILL COVER THE
  CHORIONIC VILLUS WILL BECOME THE CYTOTROPHOBLAST and
  THE OUTER LAYER WILL BE THE SYNCYTIOTROPHOBLAST
  CHORIONIC VILLUS SAMPLING or BIOPSY or CVS IS USED FOR
  PRENATAL DIAGNOSIS