Heart Development Flashcards
1
Q
What structures arise from the PHF?
A
Atria, L. ventricle, part of R. ventricle
2
Q
What structures arise from SHF?
A
R. ventricle, and outflow tracts (conus cordis & truncus arteriosus)
3
Q
When does the PHF arise and from what kind of cells?
A
Day 16 from epiblast cells from the primitive streak
4
Q
What is the 1st flexure in cardiac looping?
A
bulbocentricular loop - btwn bulbus cordis and primitive ventricle
5
Q
What is the 2nd flexure in cardiac looping?
A
Atrioventricular loop- between ventricle and primitive aorta
6
Q
What is the blood flow through the primitive four-chambered heart?
A
veins –> sinus venosus –> atria –> ventricles –> conus –> truncus –> aortic sac –> aorta
7
Q
When does the heart begin to beat?
A
day 22
8
Q
When does cardiac looping occur?
A
day 23-28
