Lecture 5

Question 1

branch from the aortic sac to the dorsal aorta traveling in the center of each pharyngeal arch
initially there are 5 pairs
these undergo considerable remodeling to form definitive vascular patterns for the head and neck, aorta, and pulmonary circulation

Answer 1

aortic arch

Question 2

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Answer 2

DUCTUS ARTERIOSUS

Question 3

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Answer 3

DOUBLE AORTIC ARCH

Question 4

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Answer 4

COARCTATION OF THE AORTA

Question 5

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Answer 5

DUCTUS VENOSUS

Question 6

proliferative inner layer of the trophoblast

Answer 6

cytotrophoblast

Question 7

outer multinucleated layer of the trophoblast that serves to invade the endometrium of the uterus

Answer 7

syncytiotrophoblast

Question 8

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Answer 8

PRIMARY VILLI

Question 9

multilayered structure consisting of the somatic layer of extraembryonic mesoderm, cytotrophoblast, and syncytiotrophoblast
contributes the fetal portion of the placenta, including the villi and villus lakes

Answer 9

chorion

Question 10

embryonic side of the chorion

where villi form

Answer 10

chorion frondosum (leafy chorion)

Question 11

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Answer 11

DECIDUA

Question 12

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Answer 12

DECIDUA BASALIS

Question 13

membrane formed when expansion of the amniotic cavity obliterates the chorionic vacity causing the amnion to contact the chorion and the two to fuse
serves as a hydrostatic wedge during the initiation of labor

Answer 13

amniochorionic membrane

Question 14

compartments (15 to 20) in the placenta formed when decidual septa grow into the intervillous spaces
septa never reach the chorionic plate so that there is communication between these

Answer 14

cotyledons

Question 15

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Answer 15

HEMOLYTIC DISEASE OF THE NEWBORN

Question 16

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Answer 16

ERYTHROBLASTOSIS FETALIS