Term
| What is the purpose of the pulmonary circuit? |
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Definition
| returning deoxygenated blood to heart and sending to lungs to become oxygenated (right side of heart) |
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Term
| What is the purpose of the systemic circuit? |
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Definition
| sending oxygenated blood to every cell and returning deoxygenated to the heart |
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Term
| Where is the mediastinum located? |
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Definition
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Term
| Where is the apex of the heart located? |
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Definition
| left side, between ribs 5-6, below nipple |
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Term
| How do you find your 2nd pair of ribs? |
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Definition
| right next to the sternal angle of your sternum |
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Term
| What is the relationship of the heart to diaphragm and to the vertebrae? |
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Definition
Superior to the diaphragm
Anterior to vertebrae |
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Term
| What is the pericardial sac and describe it's two layers |
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Definition
a double walled sac (fibrous & serous pericardium) that contains the heart and it's vessels
[image]
serous pericardium contains the parietal and visceral layer |
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Term
| Describe the 3 layers of the heart in order from outside to inside |
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Definition
1. epicardium: the visceral layer
2. myocardium: made out of cardiac muscle
3. endocardium: lines the interior of the heart |
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Term
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Definition
| contraction, either atrial or venticular |
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Term
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Definition
| relaxation, either atrial, ventricular, or both |
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Term
| What is the purpose of the cardiac conduction system? |
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Definition
| specialized cardiac muscles of heart wall send signals to heart causing contractions |
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Term
| What when the heart produces the "lub-dub" sound? |
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Definition
lub - closing of AV valves
dub - closing of semilunar valves |
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Term
| What are the parts of the heart used in cardiac conduction and identify them on the diagram |
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Definition
-sinoatrial node (SA node aka pacemaker)
-internodal fibers
-artioventricular node
-atrioventricular bundle
-bundle branches
-purkinje fibers
[image] [image] |
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Term
| What is the path of the electrical impulse through the cardiac conduction system? |
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Definition
1. SA node (pacemaker) causes R/L atria to contract pushing blood to ventricles
2. electrical signals spreads to AV node (between atria)
3. travels through the AV bundle dividing into left and right bundle branches
4. the AP (action potential) spreads to Purkinje fibers causing contraction of left and right ventricles > leads to blood being pumped to lungs and rest of the body |
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Term
| What is the purpose of the autonomic nervous system? |
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Definition
| it modulates (controls) heart rate |
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Term
| What is the purpose of the parasympathetic innervation? whats the path? |
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Definition
-slows heart rate
-vagus nerve (CN X) |
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Term
| What's the purpose of the sympathetic innervation? |
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Definition
-increase heart rate
-increase for of contractions |
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Term
| What is the purpose of the coronary circulation? name the parts involved |
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Definition
to supply the heart with oxygenated blood and to remove deoxygenated blood
[image]
-R/L coronary arteries
-branches of aorta
-coronary sinus |
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