The placenta, or organ of pregnancy:
a. is an organ that is always present in the female uterus.
b. is the organ in which the fetus will develop.
c. secretes hormones necessary for fetal survival.
d. becomes thick and engorged with blood at the time of fertilization.
Question 2
In general, a child is considered an adolescent when he reaches the age of ________ years.
A) 7 B) 12 C) 9 D) 4
