The Heart
Study the following pictures & locate the basic structures of the heart.
Review the structures & locate them on the images in the following activities.
Blood Flow Through The Heart
The heart pumps blood throughout the body in two circuits.
The pulmonary circuit sends deoxygenated blood to the lungs to pick up oxygen & release carbon dioxide. Once the gases are exchanged in the capillaries of the lungs, oxygenated blood is sent back to the heart to be pumped to the rest of the body in the systemic circuit.
The systemic circuit pumps oxygenated blood to the cells of the body, where it will release the oxygen in the capillaries throughout the body & pick up carbon dioxide. The blood is then pumped back to the heart where it will enter the pulmonary circuit.
Review the picture below to see how blood flows through the heart. Red arrows indicate oxygenated blood, whereas blue arrows indicate deoxygenated blood. The structures listed on the arrows & between them indicate the order in which blood flows through each structure.
To review, complete the following activities below.
Coronary Blood Vessels
The coronary arteries branch off the aorta & supply oxygenated blood to the myocardium (muscular layer) of the heart. The coronary veins bring the deoxygenated blood back to the right atrium, where it enters the pulmonary circuit. The following pictures depict each of the major coronary blood vessels.
Review the structures & locate them on the images in the following activities.