The heart then pumps the oxygenated blood out to the body via the aorta (the great artery arising from the left ventricle of the heart). The bronchial arteries are blood vessels that branch off from the aorta to supply blood and nutrition for the lung itself and the bronchial tubes.
Some people experience weakness in a certain area of their bodies, such as the arms or legs. Others may experience full body weakness, which is often the result of a bacterial or viral infection such as influenza or hepatitis.
Chicken pox can cause fever and weakness. A viral illness may cause fever and weakness in children, making them more susceptible to falls. The flu is the usually culprit of fever and weakness in a patient. Fever is typically caused by an infection or illness.