Autonomic outflow from the medulla is divided principally into sympathetic and parasympathetic (vagal) branches. Efferent fibers of these autonomic nerves travel to the heart and blood vessels where they modulate the activity of these target organs. The heart is innervated by vagal and sympathetic fibers.
Best Answer: The cold war didn't have a specific start or ending time but if i had to give one I'd say that it started right after WWII (1945) and ended in the early 90's, probably 1991, the fall of the Soviet Union. Source(s): xzorion54 Â· 9 years ago.
The Vietnam War was a Cold War military conflict that occurred in Southeast Asia Vietnam, Laos, and Cambodia that began in 1959 and ended in April 1975. The war was between communist North Vietnam, supported by communist allies, and South Vietnam, bolstered by the US.