1. Cardiovascular System Part 2

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

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

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

5. 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

6. 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.

7. 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.