A dry, dehiscent fruit of the Cruciferae (Brassicaceae), typically less than twice as long as wide, with two valves separating from the persistent placentae and septum (replum).
Now, if we look at a cross section of the lower leg, we can see that the fascia sends intermuscular septa that together with the interosseous membrane between the tibia and fibula divide the lower leg into four compartments
Finally V1 and V2 are considered " septal" leads because they're nearest to the interventricular septum, and V3, and V4 are " anterior" leads because they're nearest the anterior wall of the heart.
For centuries, it was accepted as fact that blood passes from the right ventricle to the left ventricle of the heart through, " invisible pores in the septum. "
The septum is formed during development as this muscular ridge of tissue grows upward from the apex, or the tip, and then fuses with a thinner membranous region coming down from the endocardial cushions.