Embryology of the CVS 1

Question 1

Where do angiogenic cell islands collect?

Answer 1

lateral plate splanchnic mesoderm

Question 2

What week does the primordial heart begin to function?

Answer 2

week 4

Question 3

Where do the blood vessels first appear?

Answer 3

in the wall of yolk sac, allantois, connecting stalk and chorion

Question 4

What do the angioblastic cords canalize to form?

Answer 4

heart tubes

Question 5

What day do the 2 heart tubes fuse?

Answer 5

day 22

Question 6

In the primitive heart tube what is the position of the atrium in relation to the ventricles?

Answer 6

Below the ventricles

Question 7

What does the bulbis cordis go on to make?

Answer 7

ventricles

Question 8

What does the sinus venosus go on to make?

Answer 8

atria

Question 9

What is the bulboventricular loop?

Answer 9

The bulbis cordis and ventricles grow faster than other regions and loop

Question 10

What is dextrocardia?

Answer 10

the heart tube loops to the left so the heart faces the right

Question 11

On what side of the septum primum does the septum secundum form?

Answer 11

right

Question 12

What does the septum secundum overlap?

Answer 12

foramen secundum

Question 13

What is the opening in the septum primum called?

Answer 13

foramen secundum

Question 14

What is the opening in the septum secundum called?

Answer 14

foramen ovale

Question 15

What is the role of the oval foramen?

Answer 15

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

Question 16

How dos the oval foramen close?

Answer 16

Septum primum fuse with septum secundum

Question 17

What is the fosa ovalis?

Answer 17

reminants of the oval foramen in the adult heart

Question 18

What doe non closure of the oval foramen cause?

Answer 18

atrial septal defect

hole in the heart

Question 19

Is ASD more common in males or females?

Answer 19

females

Question 20

What 2 types of ventricular septum form?

Answer 20

muscular

membranous

Question 21

Is VSD more common in females or males?

Answer 21

males

Question 22

What is the most common VSD?

Answer 22

Membranous type

Question 23

What are the primordial pacemakers of the heart?

Answer 23

primordial atrium

sinus venosus

Question 24

What week does the SAN develop?

Answer 24

week 5

Question 25

What does the AVN and bundle of his develop from?

Answer 25

cells of AV canal and sinus venosus

Question 26

What is the cause of cot death or sudden infant death syndrome?

Answer 26

abnormalities of conducting tissue

Question 27

Apart from the right atrium what does the sinus venosus go on to make?

Answer 27

SVC

Question 28

What does the aortic sac go on to make?

Answer 28

aortic arches

Question 29

What is transposition of great vessels a common cause of in newborn infants?

Answer 29

cyanotic disease