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        | the site where two or more arteries (or two or more veins) converge to supply the same body region   EX:  superior and inferior epigastric arteries |  | 
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        | provide only one pathway through which blood can reach an organ   EX:  renal artery of the kidney and the splenic artery of the spleen |  | 
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        | Both artery and vein walls have three layers called |  | Definition 
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        | the innermost layer of a blood vesel wall composed of endothelium CT |  | 
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        | is the middle layer of the vessel wall   smooth muscle cells Sympathetic innervation vasoconstriciton vasodilation |  | 
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        | outermost layer of the blood vessel wall   areolar CT helps achor the vessel to other structures |  | 
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        | are the largest arteries   also called conducting arteries because they conduct blood away from the heart to the smaller muscular arteries   EX:  aorta, pulmonary, brachiocephalic, common carotid, subclavian, and common iliac arteries |  | 
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        | Also called distributing arteries distribute blood to body organs and tissues.   EX:  brachial, anterior tibial, coronary, and inferior mesenteric arteries |  | 
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        | smallest blood vessels, connect arterioles to venules   Also called functional units of the cardiovascular system |  | 
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        | What are the three types of capillaries |  | Definition 
 
        | continuous capillaries fenestrated capillaries sinusoids |  | 
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        | drain capillaries and return the blood to the heart |  | 
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        | are the smallest veins companion vessels with arterioles |  | 
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        | prevent blood from pooling in the limbs and assist blood moving back to the heart   they close to prevent backflow |  | 
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        | a blood clot in a vein   EX:  calf (sural) most common site, femoral region |  | 
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        | Oxygenated blood is pumped out ot the left ventricle of the heart and enters the |  | Definition 
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        | The ascending aorta gives off the |  | Definition 
 
        | left and right coronary arteries to supply the heart |  | 
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        | What are the aortic arch branches |  | Definition 
 
        | three branches   1)  the brachiocephalic trunk 2)  the left common carotid artery 3)  the left subclavian artery |  | 
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        | Descending thoracic aorta |  | Definition 
 
        | extends several branches to supply the thoracic wall |  | 
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        | Descending abdominal aorta |  | Definition 
 
        | bifurcates into common iliac arteries these vessels divide into internal and external iliac arteries |  | 
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        | Deoxygenated blood returns to the heart via |  | Definition 
 
        | the superior and inferior venae cavae |  | 
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        | Which arteries supply most of the blood to the head and neck |  | Definition 
 
        | Common carotid arteries branch into the internal and external carotid arteries |  | 
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        | The arterial anastomosis that supplies the brain |  | Definition 
 
        | the cerebral arterial circle |  | 
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        | vertebral veins and the dural venous sinuses |  | 
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        | Which veins drain the left side of the thorax |  | Definition 
 
        | Hemiazygos and accessory hemiazygos |  | 
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        | Which veins drain the the right side of the thorax |  | Definition 
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        | Which arteries supply the diaphragm |  | Definition 
 
        | Superior phrenic artery Musculophrenic artery Inferior phrenic artery |  | 
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        | What three unpaired arteries supply the gastrointestinal tract organs |  | Definition 
 
        | Celiac trunk Superior mesenteric artery Inferior mesenteric artery |  | 
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        | continues as the axillary artery and then becomes the brachial artery |  | 
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        | The brachial artery divides into what two arteries |  | Definition 
 
        | ulnar artery radial artery |  | 
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        | The external iliac artery extends inferior to the inguinal ligament and is renamed what |  | Definition 
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        | The femoral artery enters the popliteal fossa and then becomes what |  | Definition 
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        | The popliteal artery divides into |  | Definition 
 
        | anterior and posterior tibial arteries |  | 
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        | The posteior tibial artery gives off a ___________ artery |  | Definition 
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        | The posterior tibial artery branches into what |  | Definition 
 
        | medial and lateral plantar arteries |  | 
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        | Oxygenated blood is pumped from which part of the heart |  | Definition 
 
        | the left ventricle through the systemic circulation and back to the right side of the heart |  | 
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        | Deoxygenated blood is pumped from what part of the heart |  | Definition 
 
        | the right ventricle through the pulmonary circulation and returns as oxygenated blood to the left side of the heart |  | 
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        | Three bilateral venous systems connect the sinus venosus of the heart What are they |  | Definition 
 
        | Vitelline system Umbilical system Cardinal sysem |  | 
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        | Hepatic Portal Circulation |  | Definition 
 
        | Venous drainage of most abdominal organs is an example of a portal system in that there are two carpillary beds in a series connected by a portal vein.  In the way the blood drained from the abdominal organs can be processed in the liver's wide sinusoid capillaries before going back into systemic venous circulation |  | 
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        | First trace Heart to the medial side of the left wrist and back to the heart |  | Definition 
 
        | L - AV valve L - ventricle Aortic semilunar valve L - subclavician artery L - axillary artery L - Brachial artery L - ulnar artery  Capillary bed in medial side of the left wrist L - Basalic vein L - subclavian vein L bradicephalic vein superior vena cava Right atrium R - AV valve R - ventricle Pulmonary semilunar valve Pulmonary trunk Pulmonary artery capillary bed in lung Pulmonary veins Left atrium |  | 
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        | After birth the umbilical vein becomes the |  | Definition 
 
        | round ligament of the liver |  | 
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        | Second Trace heart to the liver back to the heart |  | Definition 
 
        | L - atrium L AV valve L ventricle aortic semiluna valve aorta celiac trunk hepatic artery capillary bed in liver (hepatic sinusoid) hepatic veins inferior vena cava right atrium R AV valve right ventricle pulmonary semilunar valve pulmonary trunk pulmonary arteries capillary bed in lung pulmonary veins left atrium |  | 
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        | Third Trace   Heart to the anterior side of  the right ankle and back to the heart |  | Definition 
 
        | Left atrium mitral valve left ventricle aortic semiluna valve aorta decending valve right common iliac artery extenal iliac artery right femoral artery popilteal artery anterior tibia artery capillary loop R great saphenous vein R femoral vein R external iliac vein R common iliac vein inferior vena cava right atrium right AV valve R ventricle pulmonary semilunar valve pulmonary trunk pulmonary artery capillary bed in lungs pulmonary veins left atrium   |  | 
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        | Fourth Trace   heart to the distal part of the large intestine and back to the heart |  | Definition 
 
        | Left atrium L - AV valve L -ventricle aortic similunar valve aorta celiac trunk inferior mesenteric artery capillary llop inferior mesenteric vein splenic vein hepatic portal vein liver sinusoids hepatic vein R atrium R AV valve R ventricle pulmonary semilunce valve pulmonary trunk pulmonary arteries capillary bed in lungs pulmonary veins L atrium |  | 
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