Septation of the Atria / atrioventricular canal division

• Function of atria septation → to seperate the systemic and pulmonary circulations
• There are who embryonic muscular septa → septum primum and septum secundum
• The foramin primum is present during → septum primum formation
• The foramen primum closes during → septum secundum growth
• The foramen secundun are → perforations in the septum primum
• Separation of the systemic and pulmonary circulations is caused by → atria septation and the division of the common atrioventricular canal
• Common atrioventricular canal → opening between primitive atria and ventricles
• formation of atrioventricular septum → Endocardial cushions formed in the dorsal and ventral parts of the atrioventricular canal meet and fuse
• Result of atrioventricular septum formation → right and left atrioventricular canals