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16 Cards in this Set
- Front
- Back
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What are some functions and characteristics of the Heart?
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Pump of the cardiovascular system
Mediates between systemic/pulmon. Beats 75/min Avg. cardiac output is 5.25L/min. |
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What are the Pericardium/Heart Wall layers from superficial to deep?
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Fibrous
Parietal Pericardial Cavity Visceral/Epicardium Myocardium Endocardium |
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What is the Fibrous Skeleton and what does it do?
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The region of connective tissue between the atria and ventricles
Functions: separates the atria and ventricles Anchors heart valves Electrical insulation Framework for cardiac muscle attachment |
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What makes up the Right Atrium?
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Interatrial septum
Pectinate muscles Fossa Ovalis SA and AV nodes Tricuspid (Right AV valve) |
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What makes up the Right Ventricle?
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Interventricular Septum
Trabeculae carnae Papillary muscles Chordae Tendinae Pulmonary valve |
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What is single to the Left Atrium
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Bicuspid (Left AV valve) or Mitral Valve
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What is unique about the Left Ventricle?
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Most muscular - 3x thicker
Forms the Apex Pump of the Systemic Circuit Aortic valve |
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What type of tissue are heart valves made of?
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Dense Connective Tissue
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What makes Cardiac Muscle Tissue more unique than other muscles?
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fibers are short, branched, striated
Cells are joined by Intercalated Discs - Gap junctions - Desmosomes - keep from tearing More mitochondria and ATP than skeletal muscle |
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In the Cardiac Cycle, what is the term for contraction of a heart chamber?
What about relaxation? |
Systole
Diastole |
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When the left ventricle is in a state of systole, what state is the right ventricle in?
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Systole as well.
Atria's and Ventricles contract and relax together. AV valves and semilunar valves are open or closed together at opposite times. |
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Name the 5 steps of the Hearts conducting system.
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Sinoatrial (SA node)
- pacemaker Atrioventricular (AV node) - slows conduction from atria to vent. Bundle of His - conduct impulse to InterV septum Right & Left bundle branches - conduct impulse to apex Purkinje Fibers - ensures the heart contracts from apex up |
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Sympathetic innervation does what to the heart?
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increases the rate and force of contraction
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Parasympathetic innervation does what to the heart?
Where does this innervation come from? |
Decreases rate of contraction
Medulla and CN X Vagus |
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Name the two possibilities of Heart Failure.
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Progressive
Conjestive |
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Explain the pathway of blood.
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Just know it!
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