Exercise 40 - Reviewing Your Knowledge
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30 Terms
secondary oocyte
The name of the ovulated structure prior to fertilization
inner cell mass
The blastocyst structure that becomes the embryo
ampulla of uterine tube
The anatomical structure where fertilization normally takes place
blastocyst
The stage of the embryo that implants in the uterine wall
day 7
After fertilization, implantation normally occurs on this day
chorionic villi
The membrane that forms the embryonic side of the placenta
blastocyst
The structure that is formed after the morula stage
zona pellucida
The structure that the blastocyst sheds before implantation
decidua basalis
The structure that forms the maternal side of the placenta
amnion
The name of the thin, protective membrane that encompasses the embryo
fetal surface
The side of the placenta that is smooth and shiny
2
The number of umbilical arteries in the umbilical cord
1
The number of umbilical veins in the umbilical cord
chorion has chorionic villi
This placental structure has villi
3
The number of primary germ layers that form all body organs
placenta
Sustains the embryo with nutrients and removes wastes
ovum
The name of the female gamete
sperm
The name of the male gamete
endometrium
The inner layer of the uterus where implantation occurs
zygote
The name of the fertilized egg
ectoderm
Primary germ layer that becomes the outer skin and nervous system
endoderm
Primary germ layer that gives rise to epithelial lining of digestive and respiratory organs
mesoderm
Primary germ layer that produces bone, muscle, cartilage, and blood
amnion
The “bag of waters” that breaks at birth.
9, 38
The fetal period lasts from week _____ to week _____.
9
By week _____ all organ systems are present.
8
Toward the end of the embryonic period, week _____, the developing embryo looks like a human.
12, 20
The fetus first doubles in size between weeks _____ and _____.
16, 24
The fetus doubles in size again between weeks _____ and ________.
20, 38
The fetus more than doubles between weeks _____ and _____.