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Chapter 11 Cardiovascular System
31-45
12
Anatomy
11th Grade
02/12/2012

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Term
endocarditis
Definition
bacterial infection of the endocardium
Term
right coronary artery
Definition
Supplies oxygenated blood to the walls of the ventricles and the right atrium.
Term
left coronary artery
Definition
Directs oxygenated blood to the left anterior descending artery and the left circumflex.
Term
coronary sulcus
Definition
aka- atrioventricular groove-a surface groove encircling the heart that separates the atria from the ventricles. It contains the right coronary artery, the small cardiac vein, the coronary sinus, and the circumflex branch of the left coronary artery.
Term
coronary sinus
Definition
The coronary sinus is a collection of veins joined together to form a large vessel that collects blood from the myocardium of the heart. It is present in all mammals, including humans. It delivers deoxygenated blood to the Right atrium in conjunction with the superior and inferior vena cava.
Term
angina pectoris
Definition
crushing chest pain
Term
infarct
Definition
a region of dead, deteriorating tissue resulting from a lack of blood supply
Term
myocardial infacrction
Definition
heart attack or coronary
Term
intrinsic conduction system
Definition
aka nodal system- a system built into the heart tissue that sets basic rhythm; composed of a special tissue that is nowhere else in the body; causes heart muscle depolarization in only one direction; from the atria to the ventricles; enforces75 beats per minute
Term
components of the intrinsic conduction system
Definition
sinoatrial node-located in the right atrium

atrioventricular node-located at the junction of the atria and ventricles

atrioventricular bundle

right and left bundle branches- located -interventricular septum
Term
purkinje fibers
Definition
spread within the walls of the ventricle muscle;These fibers are specialized myocardial fibers that conduct an electrical stimulus or impulse that enables the heart to contract in a coordinated fashion
Term
depolarization
Definition
the loss of a state of polarity; the loss of a negative charge inside the plasma membrane
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