Embryology 1 (cardio)

Question 1

Circulatory system forms from the

Answer 1

lateral plate splanchnic mesoderm

Question 2

Primordial heart starts to function at the beginning of

Answer 2

week 4

Question 3

Blood vessels first appear in the wall of the

Answer 3

yolk sac

allantois

connecting stalk

chorion

Question 4

Angioblastic cords canalize to form

Answer 4

heart tubes

Question 5

Pericardium is derived from

Answer 5

intra-embryonic coelom

Question 6

Parietal layer of serous pericardium and fibrous pericardium are derives from the

Answer 6

somatic mesoderm

Question 7

Visceral layer of the serous pericardium is derived from the

Answer 7

splanchnic mesoderm

Question 8

Vitelline vein gets. venous blood from the

Answer 8

yolk sac

Question 9

umbilical vein gets venous blood from

Answer 9

placenta

Question 10

common cardinal vein gets venous blood from

Answer 10

body of the embryo

Question 11

Aortic arches arise from the

Answer 11

aortic sac

Question 12

aortic arches terminate at the

Answer 12

dorsal aorta

Question 13

How many aortic arches are there?

Answer 13

6

Question 14

…… and the ….. grow faster than other regions of the primitive heart tube - forming a U-shaped …….

Answer 14

bulbs cordis

ventricles

bulboventricular loop

Question 15

Abnormal cardiac looping leads to

Answer 15

dextrocardia

Question 16

in dextrocardia - the heart loops to the

Answer 16

left instead of the right

Question 17

clinical abnormalities involved in abnormal development of endocardial cushions and septum formation

Answer 17

atrial septum defect

ventricular septum defect

Question 18

septum formation allows for the creation of

Answer 18

left and right atrium

left and right ventricles

Question 19

endocardial cushion formation allows for the

Answer 19

separation of the right and left AV canals

Question 20

Partitioning of the primordial atrium into left and right atria starts at

Answer 20

the end of week 4

Question 21

Foramen ovale is an opening in

Answer 21

septum secundum

Question 22

Common atrial septal defect

Answer 22

patent foamen ovale

Question 23

Four clinically significant types of ASD

Answer 23

foramen secundam defect *

endocardial cushion with Forman premium defect *

sinus venous defect

common atrium

*these two are the most common

Question 24

Role of oval foramen before birth

Answer 24

allows most of the blood to pass from the right to the left atrium

Question 25

Role of oval Foramen after birth

Answer 25

normally closes

septum primum fuses with the septum secundum

Question 26

non-closure of oval foramen

Answer 26

atrial septal defect

Question 27

oval fossa of the adult heart is a remnant of

Answer 27

foetal oval foramen

Question 28

Bulbus cordis and trunks arteriosus undergo a 180 degree turn to from the

Answer 28

aorticopulmonary septum

Question 29

The aorticopulmonary septum divides the BC and TA into the

Answer 29

aorta and pulmonary trunk

Question 30

SA node develops during the …… week

Answer 30

5th

Question 31

adult location of the SA node

Answer 31

high in the right atrium near the entrance of the SVC

Question 32

SA node

Answer 32

pacemaker

Question 33

Fate of aortic sac

Answer 33

aortic arches

Question 34

fate of bulbs cordis

Answer 34

right ventricle

parts of the outflow tracts

Question 35

fate of the primitive ventricle

Answer 35

left ventricle

Question 36

fate of the primitive atrium

Answer 36

parts of the right and left atria

Question 37

fate of the sinus venous

Answer 37

SVC

right atrium