13737938
| Questão | Responda |
| Atrium | Receive blood, upper chambers |
| Ventricle | pump blood out, lower chambers |
| Endocardium Myocardium Epicardium | a) inner layer b) muscle layer c) outer layer |
| Arteries a) walls b) diameter c) blood | a) Thicker, strength for high pressure pumping b) Narrow c) Oxygenated blood (except for pulmonary artery carrying deO2 from heart > lungs) |
| Veins a) walls b) diameter c) blood | a) Thinner walls (Valves prevent blood flowing backwards) b) Wider c) Deoxygenated blood expt. for pulmonary vein carrying deO2 back to heart (Travels back to heart at low velocity / pressure) |
| Capillaries a) walls b) diameter c) blood | a) Very thin, enhances exchange b) One cell thick c) Both Ox + deOx blood, point of exchange (capillary beds), Very low pressure |
| Contraction phase (systole) | ventricles pump blood out |
| Relaxation phase (diastole) | atria refill w/ blood |
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