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Marieb’s Human Anatomy and Physiology Marieb w Hoehn. Chapter 19 Blood Vessels Lecture 5 Special Topics in Circulation. Lecture Overview. Pulmonary Circuit Systemic Circuit Arterial system Venous system Special Topics The Aorta and its branches Arteries and veins serving the head
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Marieb’s Human Anatomy and Physiology Marieb w Hoehn Chapter 19 Blood Vessels Lecture 5 Special Topics in Circulation
Lecture Overview • Pulmonary Circuit • Systemic Circuit • Arterial system • Venous system • Special Topics • The Aorta and its branches • Arteries and veins serving the head • Cerebral Arterial Circle • Portal systems & the hepatic portal system
Pulmonary Circuit • consists of vessels that carry blood from the heart to the lungs and back to the heart Figure from: Hole’s Human A&P, 12th edition, 2010
Systemic Circuit • Composed of vessels that lead from the heart to all body parts (except the lungs) and back to the heart • Includes the aorta and its branches (know!) • Includes the system of veins that return blood to the right atrium • Includes the coronary circulation
Major Vessels of Arterial System Figure from: Martini, Anatomy & Physiology, Prentice Hall, 2001
Descending and Thoracic Aorta Diaphragm is the point at which the thoracic aorta becomes the abdominal aorta Figure from: Martini, Anatomy & Physiology, Prentice Hall, 2001
Aorta and Its Principal Branches Table from: Hole’s Human A&P, 12th edition, 2010 **Need to know this table; if I give you an artery, you need to know which branch (part) of the aorta it arises from
Arteries to Neck, Head, and Brain Figure from: Hole’s Human A&P, 12th edition, 2010 * * * * * *
Cerebral Arterial Circle • Also called the Circle of Willis • Formed by anterior and posterior cerebral arteries, which join the internal carotid and basilar arteries Know all these Figure from: Hole’s Human A&P, 12th edition, 2010
Major Veins of the Brain, Head, and Neck Figure from: Martini, Anatomy & Physiology, Prentice Hall, 2001
Major Veins - Upper Limb and Shoulder * * Median cubital vein is often used to draw blood (venipuncture) * (deep) * (superficial) * (superficial) * * * * * Figure from: Hole’s Human A&P, 12th edition, 2010
Hepatic Portal Vein Hepatic portal vein drains one set of capillaries and connects via veins to another set of capillaries before it becomes a vein again Note that veins in the abdominal cavity drain into the hepatic portal vein Figure from: Hole’s Human A&P, 12th edition, 2010
Veins That Drain the Abdominal Viscera * * * Figure from: Martini, Anatomy & Physiology, Prentice Hall, 2001
Review • The blood vessels form a closed circuit for distribution of the blood from the heart to the tissues and back again. • The vessels of the CVS include • Arteries - carry blood away from ventricles of heart; this walled; elastic • Arterioles - receive blood from arteries/carry blood to capillaries; major flow regulators • Capillaries - sites of exchange of substances between blood and body cells • Venules - receive blood from capillaries • Veins - carry blood toward atria of heart