Animal Development

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Across
  1. 1. Embryo that looks like a person
  2. 4. Extraembryonic membrane that helps with gas exchange
  3. 7. Blastula develops into a gastrula
  4. 8. Membrane that helps the baby gets nutrients from mom
  5. 9. Fertilized egg
  6. 11. The fertilized egg attaches to the lining of the uterus
  7. 13. Forms the primitive gut
  8. 15. Union of and egg and sperm
  9. 16. Hollow ball of cells
  10. 17. This keeps the embryo in fluid
Down
  1. 2. The outer embryonic tissue layer
  2. 3. Baby food
  3. 4. Zygote divides without an increase in size
  4. 5. Formation of organs
  5. 6. The extraembryonic membrane that acts like a trash bag
  6. 10. Human's blastula
  7. 12. The middle embryonic tissue layer
  8. 14. Transition from zygote to multicellular organism