Cardiovascular Embryological Derivatives

Question 1

Splanchnic mesoderm derivatives in the early heart tube?

Answer 1

• Endocardial tubes -> Endocardium
• Myocardium
• Visceral layer of the pericardium (epicardium)

Question 2

Somatic mesoderm derivatives in the early heart tube?

Answer 2

-Parietal layer of the pericardium

Question 3

Intraembryonic celom derivatives in the early heart tube?

Answer 3

-Pericardial cavity

Question 4

Truncus arteriosus derivatives?

Answer 4

• Ascending aorta

- Pulmonary trunk

Question 5

Bulbis Cordis derivatives?

Answer 5

• Conus arteriosus (external surface)/Infundibulum (internal)
• Aortic vestibule

Question 6

Primitive ventricle derivatives?

Answer 6

• Trabeculated right ventricle

- Trabeculated left ventricle

Question 7

Primitive atrium derivatives?

Answer 7

• Right and left auricles
• Small trabeculated part of the right and left atria together with the interarterial septum (septum spurium, primum, and secundum)

Question 8

Septum spurium derivates?

Answer 8

• Crista terminalis
• Eustachian valve
• Thebesian valve

Question 9

Sinus venosus derivatives?

Answer 9

Right horn:
-Sinus venarum cavarum

Left horn:

• Oblique vein of the left atrium (Marshall’s)
• Coronary sinus

Question 10

Septum primum derivatives?

Answer 10

-Valve/limbus of the oval fossa

Question 11

Septum secundum derivatives?

Answer 11

-Oval fossa

Question 12

Foramen ovale derivatives?

Answer 12

-Fossa ovale

Question 13

Endocardial cushions derivatives?

Answer 13

• Membranous septa of the heart
• Aortic and pulmonary channels
• Atrioventricular canals and valves

Question 14

Bulbar and truncal ridge derivatives?

Answer 14

• Aoriticopulmonary septum

- Membranous part of the interventricular septum

Question 15

Aortic sac derivatives?

Answer 15

• Part of the ascending aorta
• Brachiocephalic trunk
• Proximal part of the common carotid arteries

Question 16

1st pharyngeal arch arteries derivatives?

Answer 16

No main arteries, but…

• Maxillary arteries
• External carotid arteries

Question 17

2nd pharyngeal arch arteries derivatives?

Answer 17

No main arteries, but…

• Stapedial arteries
• Hyoidal arteries

Question 18

3rd pharyngeal arch arteries derivatives?

Answer 18

• Distal common carotid arteries

- 1st part of the internal carotid arteries

Question 19

4th pharyngeal arch arteries derivatives?

Answer 19

• Proximal part of the right subclavian artery

- Part of the aortic arch

Question 20

5th pharyngeal arch arteries derivatives?

Answer 20

NOTHING

Question 21

6th pharyngeal arch arteries derivatives?

Answer 21

• Proximal part of the right pulmonary artery
• Proximal part of the left pulmonary artery
• Ductus arteriosus (Botalli)

Question 22

Dorsal aorta derivatives?

Answer 22

• Middle portion of the right subclavian artery
• Descending aorta
• Thoracic and abdominal aorta
• Median sacral artery

Question 23

Intersegmental arteries 1-6 derivates?

Answer 23

-Vertebral arteries

Question 24

7th intersegmental artery derivatives?

Answer 24

• Left subclavian artery

- Distal portion of the right subclavian artery

Question 25

Intersegmental artery derivatives in the thoracic, abdominal, and sacral region?

Answer 25

Thoracic: Intercostal arteries Abdominal: Lumbar arteries, Common iliac arteries Sacral: Lateral sacral arteries

Question 26

Vitelline arteries derivatives?

Answer 26

- Celiac trunk - Superior mesenteric artery - Inferior mesenteric artery

Question 27

Umbilical arteries derivatives?

Answer 27

-Superior vesical arteries -Median umbilical ligaments (Some books say internal iliac arteries)

Question 28

Ductus arteriosus derivatives?

Answer 28

-Ligamentum arteriosus

Question 29

Vitelline veins derivatives?

Answer 29

- Portal vein and hepatic circulation | - IVC (hepatocardiac portion)

Question 30

Umbilical vein derivatives?

Answer 30

Right: -Degenerates Left: -Round ligament (ligamentum teres hepatis)

Question 31

Ductus venosus (arantii) derivatives?

Answer 31

-Ligamentum vensoum (arantii)

Question 32

Anterior cardinal veins derivatives?

Answer 32

Both: -Left brachiocephalic vein Right: - Internal jugular vein - Brachiocephalic vein - Upper part of the SVC Left: - Internal jugular vein - Ligament of the IVC

Question 33

Common cardinal vein derivatives?

Answer 33

Right: -Lower part of the SVC Left: -Oblique vein of the left atrium (Marshall's)

Question 34

Posterior cardinal vein derivatives?

Answer 34

Right: - Root of the azygos - Common iliac veins Left: -Left superior intercostal vein

Question 35

Supracardinal vein derivatives?

Answer 35

Right: - Azygos vein - Postrenal segment of the IVC Left: -Hemiazygos vein

Question 36

Subcardinal veins derivatives?

Answer 36

- Left renal vein - Gonadal veins - Suprarenal veins - Prerenal/Renal segment of the IVC

Question 37

Primordial pulmonary vein derivatives?

Answer 37

- 4 pulmonary veins | - Smooth part of the left atrium