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Collection of Proteins that connect Cardiac muscles at branch points:
Desmosomes
Gap Junctions |
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| Type of Incalated disc that physically connects the tissue together and allows muscles to pull against each other without damaging membrane |
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| Type of Incalated disc that allows for calcium and other ions to move through and inbetween cells allowing muscle cells to excite each other. |
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| Top chambers of the heart that are thin muscled and pump to the ventricle |
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| Bottom chambers of the heart with thick muscle walls and pump blood to the lungs and body |
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| Consist of a superior and inferior, brings back deoxygenated blood to the heart, specifically the right atrium |
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| Transports oxygenated blood from the heart to the rest of the body |
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Sinoatrial node
Pacemaker start of the action potential for the contraction of the heart cell, SA node then leads to the AV Node and the Bachmann Bundle, excited 100-80x p/min |
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| Artrioventricular Node, continues the action potential down to the AV bundle or Bundle of His. excited 80-60x p/m |
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| Continues the Action Potential to the Purkinje Fibers 60-40x p/m |
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| Fibers that surrond all the other parts of the heart allowing it to contract. 40-20x p/m |
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| striated, contract, branched, can excite neighbors and be excited |
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| Initiate and facilitate the flow of the Action potential for heart beat |
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| The Resting Membrane Potential of the heart in which pressure is high outside of the heart, and low inside of the heart, local potential period, blood fills ventricle and then up to atrium |
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| ventricles contract due to the action potential but the blood stays within ventricles, closes av nodes and contracts from bottom up, |
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| ventricles push blood into the lungs and aorta due to action potential reaching perkinje fibers, end systolic volume |
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| Semirlunar nodes-- aorta and pulmanary nodes close |
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| blood that is forced from atrials to ventricles atrial systole |
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| blood that is moved from ventricles to lung and body ventricular ejection |
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| amount of blood pumped each time from left ventricle |
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| amount of blood pumped by left ventricle in one minute HRxSV |
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| increases the amount of contractions of the heart |
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| does not stop but slows down the amount of heart contractions |
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