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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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robsoria1 robsoria1
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6 years ago
The following is true of the placenta:
 
  a. It is formed from trophoblast cells at the site of implantation.
  b. Maternal and fetal blood mix in nutrient exchange.
  c. The placental barrier protects the fetus from viral infections.
  d. It begins functioning at the 6th week of em-bryonic development.
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oliviabowlingoliviabowling
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6 years ago
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robsoria1 Author
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6 years ago
Good timing, thanks!
missnoname
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Yesterday
Correct Slight Smile TY
jamesbove
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2 hours ago
Smart ... Thanks!
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