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.
Anemia can be caused by iron deficiency, vitamin deficiency, chronic disease, bone marrow disease, autoimmune disorders and sickle cell anemia, among other causes. Anemia can be temporary or chronic, and its severity ranges from mild to marked. Cancer can cause extreme fatigue and weakness.