Closure of the interventricular foramen with formation of the interventricular membranous septum results from the fusion of tissue from three sources:
A. coronary sinus, myocardium, and endocardial cushions.
B. left bulbar ridge, right bulbar ridge, and the endocardial cushions.
C. septum primum, septum secundum, and endocardial cushions.
D. septum primum, septum secundum, and myocardium.
E. sinus venarum, crista terminalis, and endocardial cushions.
Notes: Comprehension Answers A, D, & E are unrelated to the interventricular septum. Ans C is related to septation in the atria. Ans B, the left and right bulbar ridges and the endocardial cushions compose the interventricular membranous septum.
A. coronary sinus, myocardium, and endocardial cushions.
B. left bulbar ridge, right bulbar ridge, and the endocardial cushions.
C. septum primum, septum secundum, and endocardial cushions.
D. septum primum, septum secundum, and myocardium.
E. sinus venarum, crista terminalis, and endocardial cushions.
Notes: Comprehension Answers A, D, & E are unrelated to the interventricular septum. Ans C is related to septation in the atria. Ans B, the left and right bulbar ridges and the endocardial cushions compose the interventricular membranous septum.
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