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1b 1b
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6 years ago
The umbilical cord, which connects the fetus to the placenta, contains:
 
  a. one vein and one artery c. one artery and two veins
  b. two veins and two arteries d. two arteries and one vein
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nxj n.nxj n.
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Thanks for your help!!
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This site is awesome
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this is exactly what I needed
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