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24 Cards in this Set
- Front
- Back
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Why do humans need a CV system?
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-Big! (no diffusion)
-On land! (no gills/aqueous exchange) |
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How big are capilaaries and blood cells?
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caps- 5um
blood cells- 7um (must bend) |
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What is the problem with sickle cell anemia
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Cells are messed up, so they can't bend and get through vessel!
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Where is the heart located?
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mediastinum
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What is the purpous of the pericardial sac?
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lubricants
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What happens in pericaditus?
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fluid accumulates, heart compressed
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What percentage of peopel's hearts face the left side?
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75%
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If you slow down the heart sounds, how many do you hear?
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4
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What are the cverings of the heart?
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Pericadium-fibrous and serous, parietal and visceral epicardum layers, pericardial cavity (fluid)
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What makes up 75% of the hearts weight?
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LV
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What part of the heart will enlarge with systemic and pulmonary hypertension, respectively
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LV, RV
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What are the relative sizes of LV and RV at birth?
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same size
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What is the purpous of the trabicular carnae?
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prevent trubulent flow
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What is more anterior, the aortic or pulmonary semilunar valve?
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pulmonary
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what are the lips on the aortic semilunar valves?
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2 anterior 1 posterior
(A-AAP |
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What are the lips on the pulmonary valves?
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one anterior two posterior
PApP |
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In 2025 what percentage of people will have a CV problem?
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45%
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Where is the most common (75%) place for heart blockage?
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LAD (left anterior descending) also called anterior interventricular artery (artery of sudden death)
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Are older or younger people more likely to die from a heart attack?
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younger
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What percentage of the heart is muscle cells?
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80-90%
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The number of binucleated cells ..... with age?
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increase
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What is the dark bad called?
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A band.
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What is th elght band?
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I band
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Where is the fossa ovalis?
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between r and l atria
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