1. Fearfully and Wonderfully Made

2. Gestation – Period of development before birth (38-40 weeks in Humans)

4. Amniotic Sac – Fluid filled sack that protects the child during gestation

7. Placenta – Sac of blood vessels that provide the materials from the mother the child needs

10. Umbilical Cord – The three vessels that transport nutrients and wastes from the placenta to the child

12. 2 to transport nutrients and 1 to transport wastes

13. Nervous system Week 3 – Neural plate appears which develops into the nervous system

14. Week 6 – Brain is sending out impulses to control body functions and movements

15. Week 7 – Will respond to touch

16. Week 12 – Brain is fully formed but continues to grow

17. Digestive System Week 3 – Digestive tube is present

18. Week 6 – Stomach produces digestive juices

19. Circulatory System 17 Days – Blood cells are present Week 3 – The heart begins to beat

20. Week 4 – Network of blood vessels is developed Week 8 – Heart is fully developed but continues to grow

21. Respiratory System Week 4 – Lungs, trachea, and bronchial tubes begin to form but are not used until born

22. Skeletal System Week 5 - Skeleton is taking shape made mostly of cartilage

23. Week 8 – Ossification (the replacement of cartilage with bone) starts and continues until age 25

24. Other Systems Week 6 – Able to move voluntary muscles to move around

25. Week 6 – Kidneys filter uric acid from the blood

26. Week 10 – Kidneys are fully functioning

27. Fertilization

28. Zygote

29. Zygote

30. 2 Cells

31. 4 Cells

32. 8 Cells

33. Blastocyst

34. Blastocyst

35. 6 Weeks

37. 7 Weeks

39. 8 Weeks

41. 10 Weeks

43. 14 Weeks

45. 16-20 Weeks

46. 18 Weeks

48. 21 Weeks

49. 24 Weeks

50. 25 Weeks

51. 28 Weeks

52. 5 Months

53. 32 Weeks

54. 6 Months