growth and development

Question 1

when does a zygote become an embryo

Answer 1

once the first cell division occurs

Question 2

how long does it take for an embryo to travel to the uterus

Answer 2

over five to six days

Question 3

how many days after fertilization does implantation occur

Answer 3

11 to 12 days

Question 4

the partly fetal and partly maternal organ by which materials are exchanges between a fetus and the mother; it has a network of blood vessels that provide the embryo with oxygen and nutrients from the mothers blood; wastes produced by the embryo are removed here

Answer 4

placenta

Question 5

a thin membrane filled with amniotic fluid and protects the growing embryo from bumps and injury

Answer 5

amnion

Question 6

the cord that connects the embryo to the placenta

Answer 6

umbilical cord

Question 7

a developing human from the 10th week of pregnancy until birth

Answer 7

fetus

Question 8

a serious of muscular contractions made by the uterus

Answer 8

labor