Cardiac Embryology

Question 1

all major organ systems including cardiovascular are formed between the 3rd and 8th week of development

Answer 1

Organogenesis

Question 2

Paired tubular structures form a single, slightly bent heart tube

Answer 2

Stage 1

Day 21-22

Question 3

The cephalic portion of the heart tube connects with the developing arterial system and the caudal portion with the developing systemic venous system

Answer 3

Stage 1

Day 21-22

Question 4

Artrioventricular loop formed
common atrium and common ventricle formed
Bulbus Cordis forms the Truncus Arteriosus
Sinus venosus connects with the venous portion of the circulatory system

Answer 4

Stage 2

Day 24-28

Question 5

Cardiac Septa develop, forming the four cardiac chambers
septum primum and the septum secundum formed between the atria.
PV forms
AV node and SA node develop within the right atrium.
Placenta circulation begins

Answer 5

Stage 3

Day 27-35