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22 Cards in this Set
- Front
- Back
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What are 3 functions of a vein?
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drain capillaries and return blood to the heart, blood reservoir
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Besides returning blood to the heart, what is another function of a vein?
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drain capillaries, blood reservoir
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At rest, the body's veins hold how much of the blood?
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60%
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Why is there very little pressure in the veins?
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Because most of it has dissipated after traveling through the smaller arteries and capllaries
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what are the smalles veins called?
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venules
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Where do the smallest venules do?
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drain capillaries
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What do the largest venules have?
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all 3 tunics
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Venules merge to form what?
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veins
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What type of vein will typically travel with a muscular artery?
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smaller and medium-sized veins
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What do the largest veins travel with?
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elastic arteries
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What size of vein typically travels with muscular arteries?
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smaller and medium-sized veins
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what size of vein will travel with elastic arteries?
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lare veins
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BP in veins is too low to overcome what force?
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Teh force of gravity
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What prevents blood from pooling in the limbs and assist blood moving back to the heart,?
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one-way valves formed primarily of tunica intima and strengthened by elastic and collagen fibers
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what forms the one-way valves of the vein?
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tunica intima
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How do varicose veins occur?
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the valves in the veins have become nonfunctional, causing blood to pool in one area and the vein to swell and bulge
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What happens when blood remains stationary as in varicose veins?
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coagulates and clots
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What can help varicose veins?
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tight stockings, phlebectomy
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What is a phlebectomy and why is it possible?
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procedure done for varicose veins. Veins can be removed without affecting the circulation, since the blood may be shunted to other veins that are not vericose.
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What helps the low pressure in the veins reach the heart?
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skeletal muscle pump, nearby skeletal muscles squeeze veins when they shorten and contract
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What is DVT and explain it
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Deep vein thrombosis "economy class syndrom" hahah: where a clot develops in a vein from lack of movement, pregnancy, bedridden patients.
A thrombis develops causing a back up of fluids. prevention: ROM activities, medications |
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what is an embolis? what is the term for when it goes to the lungs
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traveling clot, pulmonary embolism, eventually blocking a branch of the pulmonary artery and potentially causing respiratory failure and death
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