Embryology

Question 1

What comes from the first Aortic Arch?

Answer 1

Maxillary and External Carotid Artery

Question 2

What comes from the Second Aortic Arch?

Answer 2

Stapedial and Hyoid Artery

Question 3

What comes from the Third Aortic Arch?

Answer 3

Common Carotid and Proximal Internal Carotid Artery

Question 4

What comes from the Fourth Aortic Arch?

Answer 4

L- Aortic Arch

R Part of Left- Left Subclavian Arch

Question 5

What comes from the Fifth Aortic Arch?

Answer 5

Nothing

Question 6

What comes from the Sixth Aortic Arch?

Answer 6

Pulmonary Arteries and Ductus Arteriosus

Question 7

What comes from the Dorsal Aorta?

Answer 7

Right Subclavian and Descending Aorta below the Left Subclavian

Question 8

What comes from the Vitelline Arteries?

Answer 8

Celiac, Superior Mesenteric and Inferior Mesenteric

Question 9

What comes from the Umbilical Arteries?

Answer 9

Internal Iliac, Superior Vesical Arteries, Medial Umbilical Ligaments

Question 10

What happens in weeks 2-3?

Answer 10

Formation of endocardial Tubes

Question 11

What happens in week 3?

Answer 11

Heart Tubes form; truncus arteries outflow

Question 12

What happens at day 22?

Answer 12

First Heart Beat

Question 13

What happens at week 4?

Answer 13

Heart tube elongates and folds to form “S”

Question 14

What happens at week 5?

Answer 14

Atrial and Ventricular Septation

Question 15

What happens at week 37=38?

Answer 15

Birth- Closure of FO

Question 16

What parts of the heart are derived from NCCs?

Answer 16

Aorticopulmonary Septum and Carotid Body

Question 17

What is most of the heart derived from?

Answer 17

Splanchnic Mesoderm