Embryology

Question 1

What is the earliest organ to form and begin functioning within the developing human?

Answer 1

Heart.

Question 2

There are three germ layers which give rise to all adult tissues and organs, which one gives rise to the heart?

Answer 2

Mesoderm

Question 3

What are the two tubes hat eventually fuse to form the heart?

Answer 3

Cardiogenic tubes

Question 4

Which primitive area of the heart will give rise to right ventricle?

Answer 4

Bulbus cordis

Question 5

Which aortic arch gives rise to aorta?

Answer 5

4

Question 6

Which aortic arch gives rise to pulmonary trunk?

Answer 6

6

Question 7

Which aortic arch gives rise to right and left subclavian artery?

Answer 7

Both 4th.

Question 8

What does the trunks arteriosus form in adult structure?

Answer 8

• Aorta -Pulmonary trunk

Question 9

What does the bulbus cordis form in adult structure?

Answer 9

• Right ventricle

Question 10

what does the primitive ventricle form in adult structure?

Answer 10

left ventricle (trabeculated part)

Question 11

What does the primitive atrium form in adult structure?

Answer 11

-Anterior part of Right atrium and left atrium (trabeculated part) -Auricles of both atrium.

Question 12

What does the right horn of sinus venosus form in adult structure?

Answer 12

-valve of superior vena cava -sino atrial node

Question 13

What is the coronary sinus formed from?

Answer 13

Sinus venosus

Question 14

What is the smooth part of right ventricle formed from?

Answer 14

Bulbis cordis

Question 15

What is the rough part of right and left ventricle formed from What is the rough part of right and left atrium formed from

Answer 15

• Primitive ventricle and primitive atrium

Question 16

What is the aorta and pulmonary trunk formed from/

Answer 16

Truncus arteriosus

Question 17

Derivatives of septum primum and septum secundum

Answer 17

Septum primum- left side of atrial septum Septum secundum- right side of atrial septum

Question 18

What does the left horn of sinus venosus?

Answer 18

Coronary sinus.

Question 19

What does the ductus arteriosus become?

Answer 19

Ligamentum arteriosum. - was previously a short muscular vessel connecting the aorta and pulmonary trunk

Question 20

What is the ductus venosus?

Answer 20

temporary Vein coming from the umbilical vein, which collects oxygenated blood from the placenta and bypasses the fetal liver to go directly to the fetal heart. - ligamentum venosum

Question 21

label the cvs

Answer 21