1. Coronary Circulation
Chapter 12

2. Blood Supply to the Heart Muscle
The heart muscle (myocardium) must be fed with blood

3. Great Vessels Vessels carry blood to and from the heart. Consist of:
Superior and Inferior Vena Cave
Pulmonary arteries (2)
Pulmonary veins (4)
Aorta

4. Great Vessels Pulmonary artery Pulmonary veins
Carries unoxygenated blood from the RV to the lungs
Pulmonary veins
Carry oxygenated blood from the lungs to the LA

6. Coronary Arteries
Blood supply for the heart comes from two main arteries
Left coronary artery
Right coronary artery

8. Types of Blood Vessels Arteries Veins
Carry oxygenated blood away from the heart to the tissues (except for the pulmonary artery)
Arterioles: small arteries – carry blood toward capillaries
Capillaries: about 1 cell thick – exchange of nutrients and gases
Carry unoxygenated blood from the body back to the heart (except for the pulmonary veins)
Venuoles: small veins connected to capillaries – carry blood away from capillaries

9. How veins and arteries are constructed
3 structures common to both
Tunica Intima - inner layer endothelial cells in contact with the blood
Tunica Media - middle layer thickest layer more elastic made of smooth muscle
Tunica Externa/Adventia - outer layer made of connective tissue, collagenous fiber. The toughest layer

11. FYI...... Arterial system is under high pressure
120-? Mmhg
Venous system is under relatively low pressure
4-20mmhg

12. PERIPHERAL CIRCULATION
Movement of blood through the body
PERIPHERAL CIRCULATION

13. Anatomy of Peripheral Circulation
All the blood vessels of the body form a network that carries blood to and from the heart to deliver oxygen and nutrients, and return carbon dioxide and waste products

14. Flow of blood through the body
Veins have a unique structure equipped with a one-way valve to prevent the backflow of blood
Precapillary sphincters – guard the capillaries – determine which capillary the blood will flow

16. Blood flow to and from the liver
HEPATIC PORTAL

17. Hepatic Portal Circulation
Veins from the spleen, stomach, pancreas, gallbladder, and intestines send their blood through the hepatic portal vein into the liver.
route of blood flow through the liver

18. Blood goes through a capillary bed in the liver
Hepatic Portal
Blood goes through a capillary bed in the liver
helps remove excess glucose and store it as glycogen
also remove and detoxify various poisonous substances that may be present in the blood.