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27 Cards in this Set
- Front
- Back
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How many times is the heart divided?
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two. right and left
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What is the function of the left side of the heart?
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the left side collects blood from the pulmonary circuit and pumps blood through the systemic circuit.
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What is the function of the right side of the heart?
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the right side of the heart collects blood from the system circuit and pimps t through the pulmonary circuit.
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What is the most notable feature on the heart?
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the atria is the most notable feature of the heart.
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How many atria are there in the heart?
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two. left and right
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What is the function of the atria?
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they act as collecting tanks for blood returning from the vascular circuit.
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Where does the blood drain into that returns from the systemic circuit?
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the blood drains into the right atrium.
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Where does the blood drain into the comes from the pulmonary circuit?
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the blood drains to the left atrium.
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Which is bigger the pulmonary or systemic circuit?
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the systemic circuit
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What shape is the heart?
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upsidedown triangle. the base at the top and apex on the bottom
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pants
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el pantalón
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what is the depression that circumnavigates the heart and delineates the atria above and the ventricle below?
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coronary sulcus
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What are the superior portions of the artria?
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they are called auricles, they appear deflated in isolated hearts and resemble ears
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What is the difference between the appearance of the atria and ventricles?
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the walls of the atria appear white and smooth, while the walls of the ventricles appear dark and rough
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What are the rough projections of the ventricles called?
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trabeculaea
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true or false: the walls of the left ventricle is considerably thicker thatn the wall of the right ventricle.
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true. it is thicker because the walls consist of a thick layer of muscle called the myocardium
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what guards the passage way between the atria and the ventricles?
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the large valves called antrioventricular (AV) valves
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What prevents backflow of blood from teh ventricles into the atria during ventriclular contractions?
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AV valves
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the left AV valve consists of two flaps, or cusps.
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the two left AV valve is called BICUSPID valve
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What is the right AV valve consist of?
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the three cusps and it is called the tricuspid.
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What are the AV valves attached to the inner walls of the ventricles of what?
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they attached by the tough bands called chordeae tendinae
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What is the muscle that pulls on the chordeae tendinae?
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papillary muscle
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What are the characteristics of cardiac cells?
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-striated ( sarcomeres)
- short, compared to skeletal muscle - branched - are connected by intercalated discs - have one nucleus - contract automatically and involuntary |
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What is the atria?
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a thin-walled chambers that receive blood from the vena cava or the pulmonary veins
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What are ventricles?
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thick-walled chambers that receive blood from the atria passing through av valves cardiovascular
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Chordae tendinear?
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heart strings tendinous fibers attached to the AV valves
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Papillary muscle and trabeculae carneae?
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muscular projections on the inner walls of the ventricles
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