The human life cycle document describes 6 stages of development from infancy to adulthood. Stage 1 is infancy from birth to 1 year, where growth is most rapid and infants achieve walking, talking and eating solids by age 1 while being dependent on parents. Stage 2 is early childhood as a toddler from 1 to 2 years with slower growth. Stage 3 is preschool where muscle coordination improves. Stage 4 is elementary school where physical and muscle growth improves. Stage 5 is adolescence from 12 to 18 years where puberty occurs and independence increases. Stage 6 is adulthood from 18 years on where physical growth ends.

1. Butterfly Life Cycle

2. Human Life Cycle

3. Humans go through the
following stages…
Stage 1: Infancy (Birth-1st
Year)
o The most rapid and dramatic growth of the
human occurs during the 1st
year.
o The infant grows about an inch per month
during the 1st
six months.
o Body weight typically doubles at five months.
o By age one, most infants achieve walking,
talking, and eating solid foods.
o The infant is completely dependent upon its
parents or caretakers for survival.

4. Stage 2: Early Childhood
• Toddler (1st
two years of childhood)
• Slower rate of growth
• Developmental tasks increase (i.e.
running)

5. Stage 3: Preschool
• Muscle coordination continues to
improve

6. Stage 4: Elementary
• Physical growth and muscle growth
improves

7. Stage 5: Adolescence
• Puberty occurs: a period of rapid
physical growth
• 12-18 years old
• Begin to separate from parents and
become more independent

8. Stage 6: Adulthood
• Adults cease to grow physically after
puberty
• Humans age in appearance
• 18-old age

9. Life Cycle of a Frog

10. Life Cycle of an Oak Tree