"Diagram of circulation. r.a., Right auricle receiving superior vena cava (s.v.c.) and inferior vena…
The heart is the organ that propels the blood and causes it to circulate through the arteries, veins,…
1 Right pulmonary veins; 1' Cavity of the auricle; 2 Wall of the auricle; 3,3' Walls of the ventricle;…