A&P Ch 20 Pt 2 Word Scramble
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Question | Answer |
What are venules? | The smalls veins that are companion vessels with arterioles |
What do venules form? | Merge to form veins |
What does the largest venule have? | All 3 tunics |
What are the smallest venules? | Postcapillary venules |
What do systemic veins act as? | Blood reservoirs |
What percentage of blood is in systemic circulation? | 70% |
What are the 2 categories of systemic circulation? | Systemic veins, systemic arteries, and systemic capillaries |
What percentage of blood is in systemic veins? | 55% |
What percentage of blood is in systemic arteries? | 10% |
What percentage of blood is in systemic capillaries? | 5% |
What percentage of blood is in pulmonary circulation? | 18% |
What percentage of blood is in the heart? | 12% |
How can blood be moved from veins into circulation? | Vasoconstriction of veins. Ex : When more blood needed during exertion |
How can blood be shifted back into reservoirs? | Vasodilation of veins. Ex: When less blood needed during rest |
What is a simple pathway of blood vessels? | One major artery delivers blood to organ or region |
What is an end artery? | One that provides only one path for bloods to reach an organ or region? |
What do end arteries branch into? | Smaller arteries that become arterioles |
What do each arteriole feed into? | A capillary bed |
What drains the capillary bed? | Venule |
How is a major vein formed? | Venules merge |
What is another name for arterial anastomosis? | Arterial joining |
What is arterial anastomosis? | Two or more arteries converge to supply the same region. E.G., superior and inferior epigastric arteries supplying abdominal wall |
What does arteriovenous anastomosis (shunt) do? | Transports blood from artery directly to vein. E.G., in fingers, toes, palms, ears. |
If the body is hypothermic, what does arteriovenous anastomosis (shunt) do? | Allow areas to be bypassed |
Among the alternative pathways of blood vessels, which one is more common? | Venous anastomosis |
What is venous anastomosis? | Two or more veins drain same body region. E.G., basilic, brachial, and cephalic veins draining the upper limb |
What is a portal system? | Two capillary beds in sequence |
What is the pathway of the portal system? | artery to capillary bed to portal vein to capillary bed to vein; E.g., hypothalamo-hypohyseal portal system |
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