1. What areas of a fetus’ body advance first? In what directions does growth proceed? 2. Describe how teratogens reach a fetus. What are some factors that determine how a teratogen affects a fetus? 3....

1. What areas of a fetus’ body advance first? In what directions does growth proceed?

2. Describe how teratogens reach a fetus. What are some factors that determine how a teratogen affects a fetus?

3. What body measurements can change in older adulthood? How do they change?