Chapter 4 Puzzle

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Across
  1. 3. about every 28 days when an ovum is released by one of a women’s two ovaries.
  2. 4. uses soundwaves to make video image, called a sonogram, of a unborn baby
  3. 6. what the developing baby is called from about the third week of pregnancy to the eight week of pregnancy.
  4. 8. during the final stage of pregnancy the developing baby is called a...
  5. 9. absorbs the food and oxygen from the mother and submits these to the baby through the umbilical cord
  6. 12. the baby does not develop normally which can cause the baby to die
  7. 14. the inability to become pregnant
  8. 15. an egg cell
  9. 16. the organ in a woman’s body in which a baby develops during pregnancy
Down
  1. 1. tiny threadlike structures in the nucleus of every cell
  2. 2. genes are made up of complex molecule called...
  3. 5. the lining of the uterus has thickened enough to provide a place for the zygote to attach itself and continue to grow.
  4. 7. every person has 20,000 to 25,000 genes that determine their genetic makeup.
  5. 10. when sperm reaches the fallopian tubes, it may penetrate and fertilize the ovum.
  6. 11. a male cell
  7. 13. units that determine a human’s inherited characteristics