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The Cardiovascular SystemSouthern New Hampshire UniversityNicole Tekaucic
The cardiovascular system (or circulatory system)is responsible for the flow of blood, nutrients, oxygen, gases and hormone while maintaining thermoregulation. It consists of:The heart, which is located just behind and slightly left lateral of the breastbone in the superior torsoCoronary arteries: The right lateral coronary artery, the left anterior coronary, the left lateral anterior descending, and the left lateral circumflex artery all branch of the base of the aorta.Veins, which are located throughout the entire body.(Bupa, 2011).
HeartPumps blood through the arteries and veins, and sends nutrients and oxygen and hormones to the cells in the body.There are two circulatory systems, the pulmonary circulation (is a short loop from the heart to the lungs and back again) and the systemic circulation (it sends blood from the heart to all the other parts of our bodies and back again).There are four chambers of the heart. Atria: the right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle. Ventricle: the right ventricle pumps the oxygen-poor blood to the lungs. The left ventricle pumps the oxygen-rich blood to the body.(Free art, n.d.).
The veins are responsible for the return of deoxygenated blood and carrying it back to the heart, but only after the arteries carry the blood out. (OpenStax CNX, 2013).
Coronary ArteriesThe left lateral main coronary artery supplies blood to the left lateral side of the heart muscle. The left lateral anterior descending artery branches off the left lateral coronary artery andsupplies blood to the anterior of the left lateral of the heart.The circumflex artery branches off the left lateral coronary artery and encircles the heart muscle. This artery supplies blood to the outer side and posterior of the heart.The right lateral coronary artery supplies blood to the right lateral ventricle, the right lateral atrium, and the sinoatrial and the atrioventricular nodes. These regulate the heart rhythm. Smaller branches of the coronary arteries include: obtuse marginal, septal perforator, and diagonals.(Cleveland clinic, n.d.).
Tissue Types:Cardiac muscle tissue is only found in the heart and contractions of cardiac muscle pump blood into the vessels. It is striated and organized into sarcomeres, and has the same banding organization as skeletal muscle.Epithelial tissue covers the heart, veins, arteries, and capillaries. It is a protective tissue that covers the entire body. It is made up of cells and is found inside the endothelium. Endocardium is the innermost later which is in contact of lumen of heart and consists of an endothelium that lines each chamber. It has a layer of subendothelial connective tissue, a medial layer of connective tissue with some smooth

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