Which of the following is the primary accomplishment during the fetal period?
A. the attachment and growth of the placenta
B. the development of the major organ systems
C. growth and maturation of structures already present in earlier stages
D. the development of the physical structures of the body like the arms, legs, fingers and ears.
Question 2
Although we arbitrarily divide pregnancy into three trimesters, there are other periods that are more significant for the developing baby. These periods are called the ____________ period, the _____________ period, and the _______________ period.
A. germinal; embryonic; gestational
B. embryonic; fertilization; ectopic
C. fertilization; ectopic; germinal
D. germinal; embryonic; fetal
Fossil from the Carboniferous period
The Period-Luminosity Relation
Embryo and fetal development during weeks 1–25 of gestation.
Embryonic Period
Primary Actions of Hormones
Primary growth in a shoot