Cardio embryology

Question 1

Where does the cardiovascular system come from?

Answer 1

Mesoderm germ-layer cells

Question 2

What 3 layers does the mesoderm develop into after gastrulation?

Answer 2

Mesothelium
Endothelium
Myocardium

Question 3

What is gastrulation?

Answer 3

When embryo goes from 1 layer to 3 layers - ectoderm, mesoderm, endoderm

Question 4

What is the sinus venosus?

Answer 4

Cavity that precedes right atrium

Question 5

What does the sinus venosus give rise to?

Answer 5

Left side - coronary sinus

Right side - wall of R atrium

Question 6

What is the primitive atrium?

Answer 6

A stage of heart development

Question 7

What does the primitive atrium give rise to?

Answer 7

Right side - R auricle

Left side - L auricle

Question 8

What is the bulbous cordis?

Answer 8

Inferior to primitive ventricle

Question 9

What does the bulbous cordis give rise to?

Answer 9

R ventricle

Question 10

Describe blood flow around foetal heart.

Answer 10

Placenta > Umbilical vein > Foetus > Liver > RA of heart > foramen ovale > LA of heart > LV of heart > Aorta > Body