1. By: Angel, Cathy, Dawn, Jackey & Vivian
The Coronary Arteries
By: Angel, Cathy, Dawn, Jackey & Vivian

2. Coronary Arteries Supply all parts of heart muscles with blood
Left and right coronary arteries

3. RIGHT CORONARY ARTERY
Supplies blood to right atrium and right ventricle
Branches into the posterior descending artery supplying the bottom portion of the left ventricle and back of septum

4. LEFT CORONARY ARTERY Branches into:
Circumflex artery which supplies blood to left atrium and back of left ventricle
Left anterior descending artery (LAD) which supplies blood to the front and bottom of left ventricle and front of septum

5. Atherosclerosis & Cholesterol Plaque
Fats and cholesterol collect and harden in artery, forming plaque
Blood clots can form from plaque build-up
Pieces can break apart and move through the arteries
If coronary artery is blocked by plaque accumulation or by blood clot…
Cardiac muscle beyond the point of blockage is deprived of oxygen and nutrient
Area of cardiac muscle tissue ceases to function properly
Causes damage to the cardiac muscle tissue; called myocardial infarction OR heart disease
Atherosclerosis can also lead to strokes
Treatment includes healthy diet, exercise and medicine to reduce fats and cholesterol

6. Normal coronary artery
CROSS-SECTION OF A CORONARY ARTERY
Normal coronary artery
Bad artery: Narrowing of the lumen
Calcification in coronary artery; associated with atheroschlerosis

7. Coronary Artery Thrombosis
Thrombosis or blood clot
Atherosclerosis
or build up of artery wall
Thrombosis:
the formation of a clot or thrombus inside a blood vessel, obstructing the flow of blood through the circulatory system

8. ARTERIES: COLLATERAL CIRCULATION
Network of tiny blood cells
During the time that coronary arteries narrow to the point where heart muscles are limited (coronary artery disease), collateral vessels enlarge and become active
Allow blood to flow around the blocked artery to another artery nearby or the same artery past the blockage
Protecting heart tissue from injury

9. VOCABULARY WORDS: Aorta: largest artery in human body
Calcification: precipitation of calcium in arteries; an indicator of atherosclerotic plaque buildup in the arteries that supply blood to the heart
Cardiac Muscle: heart; pumps blood through circulatory system by contracting and relaxing
Cholesterol: steroid that is found in the cell membrane of all body tissues; transported by bloodstream

10. VOCABULARY WORDS Lumen: cavity/channel with tubular structure
Septum: muscle tissue between two ventricles of heart
Ventricle : fluid-filled, pumping chambers of the heart