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Human Reproduction

  1. Describe the week to week Development of the Embryo
    • 4 weeks after Fertilisation: 1. Heart forms and begins to beat.
    • 2. Brain develops
    • 3. Umbilical cord firms
    • 5 weeks: 1. Internal organs start to form.
    • 2. Limbs start to form.
    • ( embryo highly vulnerable to alcohol and drugs)
    • 6 weeks: 1. Eyes become visible
    • 2. Mouth, nose and ears begin to form.
    • 8 weeks: 1. Tail is gone
    • 2. Face becomes human looking
    • 3. Major organs formed
    • 4. Ovaries or testes can be seen.
    • 5. Bone replaces cartilage
    • 6. The embryo is now called a foetus
    • 12 weeks: 1. Bind growth continues to replace cartilage
    • 2. Nerves and muscles coordinate arm and leg movement
    • 3. Thumb sucking and kicking begin.
    • 4. Milk (baby) teeth form
    • 5. Foetus takes amniotic fluid into mouth and releases urine and faeces into amniotic fluid.
    • 6. External sex organs clearly seen and gender can be determined with a scan.
  2. In the development of the embryo what weeks are marked for certain developments?
    • 4 weeks
    • 5 w
    • 6 w
    • 8 w
    • 12 w
  3. What happens 4 weeks after fertilisation?
    • 1. Heart forms and begins to beat
    • 2. Brain develops
    • 3. Umbilical cord forms
  4. What happens 5 weeks after fertilisation?
    • 1. Internal organs start to form.
    • 2. Limbs start to form
    • (Embryo highly vulnerable to alcohol and drugs)
  5. What happens at week 6?
    • 1. Eyes become visible.
    • 2. Mouth nose and ears begin to form.
  6. What happens at week 8?
    • 1. Tail is gone
    • 2. Face becomes human looking.
    • 3. Major organs are formed.
    • 4. Ovaries or testes can be seen.
    • 5. Bone replaces cartilage.
    • 6. The embryo is now called a foetus
  7. What happens at week 12?
    • 1. Bone growth continues to replace cartilage
    • 2. Nerves and muscles coordinate arm and leg movement
    • 3. Thumb sucking and kicking begin.
    • 4. Milk teeth form.
    • 5. Foetus takes amniotic fluid into mouth and releases urns and faeces into amniotic fluid
    • 6. External sex organs clearly seen and gender can be determined with a scan.
  8. At what week does the heart begin to beat?
    4 weeks
  9. At what week do the eyes become visible?
    Week 6
  10. At what week is the tail gone?
    Week 8
  11. At what week are the major organs formed?
    Week 8
  12. At what week is the embryo now called a foetus?
    Week 8
  13. At what week does kicking and thumb sucking begin?
    Week 12
  14. At what week do milk teeth form?
    Week 12
  15. At what week can the gender be determined by a scan?
    Week 12, external sex organs clearly seen.
  16. What is the gestation period?
    Gestation period is the length of time from fertilisation to birth. (Humans 266 days/9 months)
  17. What is the gestation period for humans?
    9 months or 266 days
  18. What is the gestation period of some animals?
    • Mouse 3 weeks
    • Dog 63 days
    • Whale 18 months
Author
jacquelineglynn
ID
361895
Card Set
Human Reproduction
Description
Question
Updated

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