1. Draw and label a diagram of the heart showing the four chambers, associated blood vessels, valves and the route of blood through the heart

    http://www.slideshare.net/fernandasilva/62-h5-the-transport-system-ppt

The heart is composed by two sides with different functions. The right side receives the blood and pumps it to the lungs and the left side receives the blood and pumps it to the body. It also contains two types of chambers, the atrium and the ventricle, one of each at each side, which makes it 4 chambers (two atria and two ventricles). 

The atrioventricular valves connects each atrium to the ventricle below it. The mitral valve connects the left atrium with the left ventricle and the tricuspid valve connects the right atrium with the right ventricle.

The heart connects to blood vessels, being the aorta the largest one, which carries blood away from the heart. Another important vessel is the pulmonary artery, that connects the heart with the lungs. The superior and inferior vena cava are the two largest veins that carry blood into the heart.