Heart

Coronary arteries:
- It needs oxygen -rich blood to survive
-blood is supplied to the hearty by its own vascular system called the coronary circulation
- aorta branches off into 2 main coronary blood vessels
- these coronary arteries branch off into smaller arteries which supply oxygen-rich blood to the entire heart muscle
- right coronary artery supplies blood mainly to right side of heart, right side is smaller because it pumps blood only to lungs
- left coronary artery branches into left anterior descending artery and the circumflex artery, supplies blood to the left side of the heart
-left side is larger and more muscular because it pumps blood to the rest of the body



STRUCTURE	FUNCTION	DEOXY/OXY BLOOD
LEFT ATRIUM	collects oxygen-rich blood returning from the lungs and then forces it through the mitral valve and into the left ventricle	OXY BLOOD
LEFT VENTRICLE	largest and strongest chamber in heart, wall 1/2 inch thick but strong enough to force push blood through aortic valve and into your body.	DEOXY BLOOD
RIGHT ATRIUM	collects oxygen-poor blood returning from the body, then forces it through the tricuspid valve and into the right ventricles	OXY BLOOD
RIGHT VENTRICLE	collects oxygen-poor blood from right atrium and then forces it through pulmonary valve and into lungs.	DEOXY
PULMONARY ARTERY	carries blood into the lungs and picks up oxygen	DEOXY BLOOD
AORTA	largest artery, carries oxygen-rich blood from lungs back to heart.	OXY BLOOD
PULMONARY VEINS	carries oxygen-rich blood from lungs back to the heart.	OXY BLOOD
SUPERIOR VENA CAVA	oxygen-poor blood from the upper parts of the body returns to the heart the superior vena cave	DEOXY BLOOD
INFERIOR VENA CAVA	oxygen-poor blood from the lower parts of the body returns to the heart through the inferior vena cava	DEOXY BLOOD
ATRIOVENTRICULAR VALVES (Mitral & Tricuspid)	controls blood flow from the left atrium into ventricle	OXY BLOOD
CHORDAE TENDINAE	cord like tendors that connect the papillary muscles to the tricuspid valve and the mitral valve in the heart.	OXY BLOOD
SEMI LUNAR VALVES (Pulmonary & Aortic)	controls blood flow from the right ventricle into pulmonary arteries	DEOXY BLOOD
SEPTUM	wall of muscle called septum separates left and right atria and left and right ventricles.