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Flashcards in Ch 3 Deck (17):
1

Embryonic disk

Cells on the inside of blastocyst

2

Trophoblast

Thin outer ring of cells

3

Implantation

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

4

Amnion

Membrane that encloses the developing organism

5

Amniotic fluid

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

6

Chorion

Another protective membrane that surrounds the amnion, creates micro villi

7

Placenta

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

8

Umbilical cord

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

9

Embryo

Implantation to 8th week of pregnancy

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

10

Neural tube

Spinal cord

11

Fetus

9th week to end of pregnancy

12

Vernix

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

13

Lanugo

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

14

Age of viability

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

15

Teratogen

Environmental agent that causes damage during the prenatal period

16

Fetal alcohol spectrum disorder

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

17

Blastocyst

Hollow, fluid filled ball