answer 2
Balkan nationalism has increased tensions between Austria and Russia
answer 3
oxygenated blood leaves the lungs through the pulmonary veins, which return it to the left heart, thus completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, blood passes through the aortic valve into the aorta. Deoxygenated blood leaves the right ventricle through the pulmonary artery. from the right atrium, blood is pumped through the tricuspid valve (or right atrioventricular valve) into the right ventricle.
Answer 1
Explanation; Muscle glycogen is the glycogen stored in the muscles and the liver. Glycogen is the main source of energy during exercise, and low levels of glycogen decrease your ability to gain strength and muscle. An athlete who runs for 45 seconds gets most of his energy from muscle glycogen.