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