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Answer: trophoblasts
Answer	Crossword Clue
trophoblasts	A layer of tissue on the outside of a mammalian blastula, supplying the embryo with nourishment and later forming the major part of the placenta
trophoblasts	TROPHOBLAST, the outermost layer of cells in the morula that attaches the fertilized ovum to the uterine wall and acts as a nutritive pathway

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.

Answer: trophoblasts