A crossword on the Placenta

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Across
  1. 1. A vital organ which keeps the blood pumping
  2. 2. The pre-stage of the fetus
  3. 3. The element that we breathe for air
  4. 5. The other way of calling it a baby/child
  5. 6. The 9 month process a future mother goes through
  6. 8. The cord that connects the placenta to the fetus
  7. 11. The things that get transferred through the umbilical cord to the fetus along with oxygen
  8. 12. The term for the increase in mass/height over time
  9. 13. The developed form of the embryo
Down
  1. 1. The process the fetus uses of taking control of the mother's body for regulation
  2. 4. The animal with the longest time of pregnancy (2 years)
  3. 7. Discarded at the end of Pregnancy, is an outer shell to the fetus
  4. 9. The vital organs that allow the body to breathe
  5. 10. The animal with the smallest time of pregnancy (3 weeks)