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Question time!. How does the atrioventricular canal form?. A. B. D. C. D. A. B. C. ESA Q: Describe the formation of the inter-atrial septum. (4 marks). Septum primum forms from the roof of the common atrium towards the endocardial cushions and forms ostium primum
E N D
Question time! How does the atrioventricular canal form?
A B D C
D A B C
ESA Q: Describe the formation of the inter-atrial septum. (4 marks) • Septum primum forms from the roof of the common atrium towards the endocardial cushions and forms ostiumprimum • Ostiumsecundum forms higher up in septum primum and ostiumprimum closes • Septum secundum forms from the roof (to the right of septum primum) and forms the foramen ovalis.
What are the three physiological fetal shunts, where are they, what do they bypass, how do they close and what do they become?
Functional closure Anatomical closure LigamentumArteriosum Pulmonary A - Aorta DuctusArteriosus Lungs Foramen Ovalis Pressure Of LA increases. RV+ Lungs RA - LA Fossa Ovalis DuctusVenosus Liver Ligamentumvenosum Portal Vein - IVC