Prenatal Crossword!

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Across
  1. 6. the process of removing neurons that are no longer useful in the brain
  2. 7. muscle cells grow during prenatal life by hypertrophy and ________
  3. 8. the growth of this system is a complex/delicate interaction of hormones, genes, and external factors
  4. 9. the development of this system is most susceptible to alcohol and drugs
  5. 12. the skeletal system of an embryo starts out as this
  6. 13. this produces its own hormones and acts as a barrier between the mother and the fetus
Down
  1. 1. this muscle fiber is more suitable for endurance activities (one word)
  2. 2. this system plays a vital role in energy storage, insulation, and protection
  3. 3. almost all neurons you will ever have are formed in this organ by the 3rd and 4th prenatal months
  4. 4. direct the development of the nervous system's structures and circuits (plural)
  5. 5. prenatal muscles grow due to an increase in the number and length of this (plural)
  6. 10. adipose tissue increases ________ during the last 2 months of prenatal development
  7. 11. primary ossification begins at this point of long bones
  8. 14. the fetal age when bone cells begin to form