On the dorsal surface of the heart are the stumps of two relatively large but thin-walled blood vessels that enter the right atrium. They are connected, and you would be able to pass a slender probe continuously through them. The upper vessel is the superior vena cava, and the lower one is the inferior vena cava. 6. Observe the inside of the right atrium. What do you notice

"a.) well–developed vascular system."

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.