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Flashcards in Embryology Deck (17):
1

Which germ layer forms the heart?

Mesoderm

2

Name the 5 parts of the heart tube, from cranial to caudal end (the baby verily acquires stuff...)

Truncus arteriosus
Bulbus cordis
Ventricle
Atrium
Sinus venosus

3

What does the truncus arteriosus of the heart tube produce?

Aorta
Pulmonary trunk

4

What does the bulbus cordis of the heart tube produce?

Right ventricle
Outflow of both ventricles

5

What does the ventricle of the heart tube produce?

Left ventricle

6

What does the atrium of the heart tube produce?

Right and left atria

7

What does the sinus venosus of the heart tube produce?

Right atrium
Coronary sinus

8

Which 3 vessels enter the right + left horns of the sinus venosus?

Vitelline vein
Umbilical vein
Cardinal veins

9

What does the vitelline vein drain?

Yolk sac

10

What does the umbilical vein drain?

Placenta

11

What do the cardinal veins act as precursors for?

The systemic venous system

12

Remnants of the left horn of the sinus venosus give rise to the coronary sinus. True/False?

True

13

What is the function of the ductus venosus?

Directs O2-rich blood from placenta (umbilical vein) to IVC, bypassing the liver

14

What is the function of the foramen ovale?

Directs O2-rich blood from RA to LA so it goes to brain and not lungs

15

What is the function of the ductus arteriosus?

Directs deoxygenated blood from pulmonary artery to descending aorta so it goes to placenta to get O2

16

What is the remnant of the umbilical vein in adults?

Ligamentum teres

17

What is the remnant of the ductus arteriosus in adults?

Ligamentum arteriosum