Embryology
Test 2 material
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The fetal period is from?
Crown-rump length is what?
Increase in weight for the fetus is when?
The face becomes more human when?
Primary ossification centers are present in the?
When can sex of fetus be determined?
The fetus is covered by fine hair, what’s this called?
When is movement felt by the mother?
How do you calculate date of birth?
What is amniocentesis?
Chorionic villus sampling is what?
What cells are characterized by a great number of secondary and tertiary villi that give it a radial
appearance?
As pregnancy develops, villi cover surface of the?
What’s decidua?
Chorion frondosum and decidua basalis make up?
Name the 2 components of the placenta?
The placenta is divided into a number of compartments called?
What is the shape of the placenta at full term?
Cotyledons receive their blood through what?
The placental membrane has 4 layers, name them:
Maternal antibodies are taken up by pinocytosis by the?
The synctiotrophoblast produces this chemical; its used as an indicator for pregnancy from the
mother’s urine.
The line of reflection between the amnion and embryonic ectoderm is known as?
Name 3 things the amniotic fluid aids in:
Another word for fraternal twins?
Type of twin that develops from a single fertilized ovum?
What is the science that studies birth defects present at birth?
Name several types of anomalies:
Name the drug that was found linking limb defects in 1961.
This syndrome has an extra copy of chromosome 21.
Name the functional layer of the endometrium, which is shed during parturition.
What are the components of the placenta?
What maternal hormone crosses the placenta and produces carcinoma?
What viruses can pass the placenta and cause congenital malformations?
Can drugs pass through placenta barrier and cause fetal drug addiction?
What is the line of reflection between the amnionic and embryonic ectoderm (oval shape):
At 5th week what structure passes through the primitive umbilical ring?
What does the connecting stalk connect?
What does the canal connect?
What does the abdominal cavity becoming too small cause?
In what month is the intestinal loop drawn into the body?
What surrounds the umbilical vessels?
The placenta goes through 4 changes at the end of pregnancy, name them:
What is the diameter and length of the umbilical cord at birth?
Amnionic fluid is produced by?
What is the amnionic fluid responsible for?
What month does fetus begin to swallow amnionic fluid?
Excess amnionic fluid is called?
Types of conjoined twins:
Answers
* these answers have not been verified and may not be correct
1. Third month to birth
2. Length of fetus
3. Last 2 months of gestation
4. 3rd month
5. long bones and skull by the 12 th week
6. 12th week
7. lanugo hair
8. 5th month
9. count 280 days from the first day of the last normal menstrual period
10. Inserting through mother’s abdominal wall and uterus into the amniotic cavity. Analyzed for alphafetoprotein. High concentration of this is when there is open neural tube defect.
11. A technique where a small piece of chorionic tissue is obtained, this screens for chromosomal and
biochemical defects.
12. Trophoblast
13. Chorion
14. The functional layer of the endometrium
15. Placenta
16. Fetal portion is formed by chorion frondosum. Maternal portion is formed by decidua basalis
17. Cotyedons
18. Discoid shape
19. Spiral arteries; these pierce the decidual plate and enter the intervillous spaces
20. Endothelial lining of fetal vessels, connective tissue in the villus core, cytotrophoblastic layer,
syncytium
21. Syncytiotrophoblast, then transported to fetal capillaries
22. Gonadotropins = human chorionic ganadotropin
23. Primitive umbilical ring
24. Absorbs jolts, prevent adherence of the embryo to the amnion, allows for fetal movements
25. Dizygotic
26. Identical or monozygotic twins
27. Teratology (Greek for monster)
28. Malformations, disruption, deformations, syndrome
29. Thalidomide
30. Down syndrome
31. Decidua
32. Fetal portion, maternal portion
33. Diethylstilbestrol
34. Rheubella, coxsackie, bariola, verichella, measles, polio
35. True
36. Primitive umbilical ring
37. Connection stalk, yolk sac stalk, canal
38. Atlantosis and umbilical vessels
39. The intra and extra embryonic coelemic cavaties
40. Ambilical hernia
41. 3rd month
42. Jelly of Wharton, made of proteoglycan, function of protection
43. Increase fibrous tissue in chorivillus, increase thickness of basement membrane of fetal capillaries,
obliterative changes of capillaries of villi, deposition of fibrinoid on surface of villi in junctional zone
and chorion plate
44. 2 cm diameter; 50-60cm in length
45. amnionic cells, derived from maternal blood
46. Absorb shock, prevent adherence, allow for fetal movement
47. 5th month, 400ml per day
48. Hydroamniose, results in maternal diabetes, renal agenesis (oligohydraamniose = decreased amount)
49. Thoracopagis, pygopagis, craniopagis