UNSW Embryology Outflow Tract Heart (cut) Week 5, right oblique view.

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Presentation transcript:

UNSW Embryology Outflow Tract Heart (cut) Week 5, right oblique view

atrioventricular canals right and left atria right and left conotruncus lumen Heart (cut) Week 5, right oblique view

ventricular septum (muscular) endocardial cushions ventricles right and left Heart (cut) Week 5, right oblique view conotruncus lumen

Endocardial cushion development (truncal and bulbar) Endocardial cushion development (truncal and bulbar)

bulbar ridges truncal ridges Endocardial cushion development (truncal and bulbar) Endocardial cushion development (truncal and bulbar)

bulbar ridges truncal ridges Truncal mesenchyme expands due to migration from: ventral pharyngeal area, pharyngeal arches and endoderm Truncal mesenchyme expands due to migration from: ventral pharyngeal area, pharyngeal arches and endoderm

Both ridges grow superiorly and inferiorly then fuse with the atrioventricular endocardial cushions and the intraventricular septum

Cardiac neural crest migration from pharyngeal arches contributes to division of the outflow tract

Both ridges grow superiorly and inferiorly then fuse with the atrioventricular endocardial cushions and the intraventricular septum

Aorta and pulmonary trunk are then initially established from this septation

primodial pulmonary trunk primodial aorta Aorta and pulmonary trunk are then initially established from this septation

Aorta and pulmonary trunk development

pulmonary trunkaorta

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