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.
Second, the cauda equina contains the ventral roots of the spinal cord, through which the motor axons of the spinal cord pass to innervate muscles. If the injury to the ventral root is close to the motor neurons that sent the axons, the injury may damage the motorneuron itself.