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.
A ventral root is a type of nerve root that branches off the spinal cord, exits the spinal column and continues on its path to specific areas of the body. At each level of the spinal cord, two nerve roots branch out, one to the left and one to the right.