For most Parkinson's patients, the cause lies somewhere in the middle. While many Parkinson's patients report one or more family members with the disease, it is not always clear that one or several genes are the cause.
In fish there are two aorta: the ventral aorta that carries blood to the gills, and a separate dorsal aorta that carries the blood to the body.This works well with a fish's two chambered heart.n fish there are two aorta: the ventral aorta that carries blood to the gills, and a separate dorsal aorta that carries the blood to the body.
Vessels of the dorsal aorta. Quiz. The right and left dorsal aortas (later descending aorta) develop in parallel with the heart and gain access to it via the aortic arches. In a lengthy process the paired dorsal aortic anlagen unite and finally form the unpaired descending aorta of the adult.12-17.uiz. The right and left dorsal aortas (later descending aorta) develop in parallel with the heart and gain access to it via the aortic arches. In a lengthy process the paired dorsal aortic anlagen unite and finally form the unpaired descending aorta of the adult.