Term
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Definition
| pump of the cardiovascular system |
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Term
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Definition
| beats 75/minute, 108,000/day |
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Term
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Definition
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Term
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Definition
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Definition
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Term
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Definition
Vessels that carry blood to and from the lungs
Right atria and ventricle |
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Term
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Definition
Vessels that transport blood to and from the body tissues
Left atria and ventricle |
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Term
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Definition
| Anterior and inferior and points to the left hip |
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Term
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Definition
| Triple layered sack that encloses heart |
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Term
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Definition
Fibrous Pericardium
Attached to diaphragm
Double layered serous membrane
Parietal layer
Visceral layer |
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Term
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Definition
Space between parietal and visceral layers
Contains serous fluid |
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Term
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Definition
Prevents undesired movement
Prevents overfilling of heart
Reduces friction |
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Term
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Definition
Visceral pericardium
Most superficial layer |
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Term
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Definition
Forms bulk of heart
Cardiac muscle
Located deep to the epicardium
Myocardial infarctions occur in this layer |
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Term
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Definition
Lines heart chambers
Covers valves
Deepest layer |
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Term
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Definition
| Connective tissue between the atria and ventricles |
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Term
| functions of the fibrous skeleton |
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Definition
Separates the atria and ventricles
Anchors heart valves
Provides electrical insulation between atria and ventricles
Provides framework for the attachment of cardiac muscle tissue |
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Term
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Definition
receiving chamber for oxygen poor blood from systemic circuit
-tricuspid |
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Term
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Definition
Pump of the pulmonary circuit
- valve: pulmonary semilunar |
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Term
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Definition
Posterior surface of the heart
Receives oxygen rich blood from lungs
Left atrioventricular (AV) valve or Bicuspid or Mitral valve |
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Term
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Definition
most muscular of hte heart chambers. 3X thicker.
- pump of the systemic system
-aortic semilunar valve |
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Term
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Definition
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Term
| cardiac muscle tissue fibers |
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Definition
| Fibers are short, branched, striated, and contain 1-2 nuclei |
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Term
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Definition
| join cardiac muscle cells |
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Term
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Definition
| increase flow of electrolytes |
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Term
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Definition
| prevent cardiac muscle from pulling apart |
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Term
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Definition
| has more mitochondria and ATP than skeletal muscle |
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Term
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Definition
| contraction of a heart chamber |
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Term
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Definition
| relaxation phase of a heart chamber |
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Term
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Definition
cells act as pacemaker
-establishes pace for cardiac activity |
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Term
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Definition
| slows conduction of impulse as it travels from atria to ventricles |
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Term
| Atrioventricular (AV) bundle or Bundle of His |
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Definition
| Conduct impulse into the interventricular septum |
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Term
| Right and left bundle branches |
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Definition
| Conduct impulse down interventricular septum to the apex of the heart |
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Term
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Definition
| Ensures that the heart contracts from apex and up the walls of the ventricles |
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Term
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Definition
Sympathetic innervation
T1-T5
Increases the rate and the force of heart contraction
Parasympathetic innervation
Medulla oblongata and vagus nerve (CN X)
Decreases the rate of heart contraction |
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Term
| progressive heart failure |
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Definition
| Weakened ventricles, failure of ventricles to empty completely, overfilling of ventricles, congestive heart failure |
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Term
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Definition
Heart enlarges greatly, pumping efficiency progressively declines, pulmonary edema
Cause unknown |
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Term
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Definition
Commonly called a heart attack
Caused by blockage of a coronary artery
Lack of blood flow to a region of the myocardium can cause heart muscle to die
Due to oxygen depravation |
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