Chapter 10 - The Cardiovascular System Flashcards
Coronary sinus
Large vein that drains blood from the walls of the heart and drains into the right atrium.
Tricuspid valve
Atrioventrical valve on the right side of the heart
Mitral valve
Also called the bicuspid valve. Atrioventrical valve on the left side of the heart
Pulmonary valve
Between the right ventricle and the pulmonary artery.
Aortic valve
Between the left ventricle and the aorta
Systole
Contraction of the heart
Diastole
Relaxing of pressure of the heart
Chordae tendinae
Tendons that connect the inlet valves to papillary muscles of the inferior wall of the ventricles. Also called heart strings
Pacemaker cells
Ability to generate an electrical impulse and pass it to other cells. Shortens the fibers in the heart when receiving the impulse
Sinoatrial node
Pacemaker node in the right atrium near the superior vena cava.
Atrioventrical node
Located lower in the septal wall of the right atrium. Slows impulses to allow the atria to fill with blood before contracting the ventricles.
Bundle of His
Heart muscles specialized for electrical conduction. After the AV node.
Purkinje fibers
End of the bundle branches. Lie across the surface of the ventricles and signal the myocardium to contract the ventricles
Coronary arteries
Two arteries that emerge from the aorta and split into left and right segments. Supply oxygen and nutrient rich blood to the myocardium
Left coronary artery
1 inch long and about the diameter of a soda straw. Splits into left anterior descending and left circumflex coronary arteries.
Left anterior descending artery
Embedded in the surface of the front side of the heart
Left circumflex coronary artery
Circles around the left side of the heart and is embedded in the surface of the back of the heart.
Right coronary artery
Travels along the atrioventrical groove between the right atrium and ventricle. Gives rise to the acute marginal branch as it wraps around the right side and branches into smaller branches that penetrate the heart muscle
Acute marginal branch
Split from the right coronary artery and covers the anterior portion of the right ventricle
Systemic circulation
Blood that circulates throughout the body
Pulmonary circulation
Blood travels from the heart to the lungs, and back to the heart
Coronary circulation
Blood that travels through the tissues of the heart
Aneurysm/o
Aneurysm
Angi/o, vas/o, vascul/o
Vessel