1. Human Development
Vocabulary

2. 1. Meiosis Human’s production of sex cells
Each contains 23 chromosomes

4. 2. sperm
Male sex cell

6. 3. egg-
Female sex cell

8. 4. fertilization-
Process where male & female sex cells join together

10. 5. zygote-
Result of fertilization & first cell of developing offspring (baby)
This stage of development lasts approx 3 weeks

12. 6. implantation-
Process when zygote becomes implanted in lining of uterus of female mammals

14. 7. uterus-
Hollow, muscular pelvic organ where zygote begins developing

16. 8. mitosis- Cell division
Parent cells divide into daughter cells each with 46 chromosomes

18. 9. embryo-
Name given to developing baby between weeks 3 & 8 of pregnancy

20. 10. fetus-
Name given to developing baby after 8 weeks of gestation until birth

23. 11. Full term-
Fetus is fully developed & could survive outside of mom’s uterus
35-40 weeks gestation

25. 12. gestation-
Length of normal pregnancy

28. 13. newborn-
Stage of growth after birth until 1 month of age

31. 14. infancy-
Stage of growth from 1 month until 1 year of age

33. 15. toddlerhood-
Stage of growth of child from 1 year until about 3-4 years old

35. 16. preschooler
Development of child from 3-4 years until 5

37. 17. Primary school age-
Child’s development from 5-10

39. 18. pre-adolescence-
Begins at approximately age 10 & leads into puberty

41. 19. puberty-
Beginning of adolescence where a child’s body is changing into an adults & can reproduce
Girls 10-12
Boys 12-14

44. 20. adolescence-
Beginning of puberty into adulthood

47. 21. adulthood-
End of puberty & end of physical growth

49. 22. old-age-
When human nears expected life span