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Home Q & A Board Science-Related Homework Help Psychology Developmental Psychology
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kak2z kak2z
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6 years ago
The ________ is an organ that allows oxygen, nutrients, and other substances to be transferred between the mother's and baby's blood.   
A)

amnion   
B)

placenta   
C)

yolk sac   
D)

umbilical cord
Textbook 
Lifespan Development, Canadian Edition

Lifespan Development, Canadian Edition


Edition: 6th
Authors:
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ValconeyeValconeye
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6 years ago
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kak2z Author
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6 years ago
this is exactly what I needed
kamikazekota
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Yesterday
This helped my grade so much Perfect
zsc999
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2 hours ago
Smart ... Thanks!
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