Ch.18 Sec. 1 Development before Childbirth

A united female ovum and a male sperm cell is called.....

• embryo

• zygote

• blastocyst

• baby

The attachment of the uterine by a blastocyst is called......

• implantation

• fertilization

• amniotic sac

• blastocyst

A sphere of cells surrounding a hollow center.

• embryo

• zygote

• blastocyst

• fetus

Where does fertilization occur?

The fluid filled bag of thin tissue that develops around the embryo is called....

• placenta

• fetus

• umbilical cord

• amniotic sac

What structure holds the embryo to the wall of the uterus and delivers oxygen and nutrients from the mother's blood?

• amniotic sac

• placenta

• umbilical cord

• uterus

What is another word for the embryo's lifeline?

• umbilical cord

• placenta

• amniotic sac

• heart

What is the name of a developing human from 3 months through birth?

• zygote

• embyro

• blastocyst

• fetus

..................... and ..................... are important for a healthy pregnancy.

How many extra calories should a pregnant women eat?

• 200

• 300

• 400

• 500