The Venous System Flashcards
Systemic venous system carries blood back to heart from _
Tissues
Blood then pumped through pulmonary circulation to be reoxygenated before entering _ again
Systemic circulation
Veins originate in tiny _ that receive blood from capillaries
Venules
Veins converge forming larger and larger vessels until two main _ are formed
Collection veins of body
Two main collecting veins of body are called superior and inferior _ (2)
Vena cavae
Superior and inferior vena cavae drain into _
Heart
At any time _ percent of blood in venous system
65
Artery walls are _
Thicker
Arteries lie _ many veins lie _
Deep
Superficially
Blood that leaves gut in veins of stomach and intestines don’t _
Pass directly back to heart
Blood that leaves gut in veins of stomach and intestines first passes into _ system
Hepatic portal venous
Hepatic portal venous system carries blood through _ before it can return to systemic circulation
Liver tissues
Far greater variability of layout of _ among people
Veins
Varicose veins caused by defective _
Valves in veins
