Cardiovascular System Part 2

Paths of Circulation Pulmonary Circuit Arteries carry blood from right ventricle to the Alveolar capillaries in the lungs and Alveolar capillaries exert less pressure than normal capillaries Veins that lead back to the left atrium

Paths of Circulation Systemic Circuit Left ventricle to all parts of the body (including the heart) Vessels leading back to the heart Includes aorta

Arterial System Ascending aorta Contains right and left coronary arteries Branches of the aortic arch: Brachiocephalic Left common corotid Left subclavian arteries

Venous System Veins return blood back to the heart Large veins parallel the paths of major arteries The median cubital vein Often used as site for venipuncture The jugular vein drains: Brain, neck, and head

Venous System of the Abdominal Viscera The blood in the hepatic portal system is rich in nutrients. The blood from the abdominal viscera generally enters the hepatic portal system and is carried to the liver. Liver helps regulate blood concentrations of glucose, amino acids, and lipids.

Life-Span Changes Plaque build-up may begin early Heart rate and output decline slightly with age Blood pressure increases with age, while resting heart rate decreases with age Moderate exercise correlates to lower risk of heart disease in older people.