Ch 3

Question 1

Embryonic disk

Answer 1

Cells on the inside of blastocyst

Question 2

Trophoblast

Answer 2

Thin outer ring of cells

Question 3

Implantation

Answer 3

7th and 9th day: blastocyst burrows into uterine lining

Question 4

Amnion

Answer 4

Membrane that encloses the developing organism

Question 5

Amniotic fluid

Answer 5

Keeps the temperature of the prenatal world constant and provides cushion against any jolts caused by the woman’s movement

Question 6

Chorion

Answer 6

Another protective membrane that surrounds the amnion, creates micro villi

Question 7

Placenta

Answer 7

Permits food and oxygen to reach the developing organism and waste products to be carried away

Question 8

Umbilical cord

Answer 8

1 to 3 ft. Contains one large vein that delivers blood loaded with nutrients and two arteries that remove waste products

Question 9

Embryo

Answer 9

Implantation to 8th week of pregnancy

Rapid prenatal changes, ground work for body structures and internal organs

Question 10

Neural tube

Answer 10

Spinal cord

Question 11

Fetus

Answer 11

9th week to end of pregnancy

Question 12

Vernix

Answer 12

White, cheese like substance that protects its skin from chapping during the long months spent bathing in the amniotic fluid

Question 13

Lanugo

Answer 13

White, downy hair that helps the vernix stick to the skin

Question 14

Age of viability

Answer 14

Point at which the baby can first survive, occurs 22 between and 26 weeks

Question 15

Teratogen

Answer 15

Environmental agent that causes damage during the prenatal period

Question 16

Fetal alcohol spectrum disorder

Answer 16

Term that encompasses a range of physical, mental, and behavioral outcomes caused by prenatal alcohol exposure

Question 17

Blastocyst

Answer 17

Hollow, fluid filled ball