chapter 29 Flashcards
vascular system
closed transport system of the blood
heart pumps blood into
arteries which leave the heart
arterioles feed the
capillary bed in tissue
arteries
carry blood away from heart
elastic arteries
largest in the body
can stretch without injury to accommodate the surge of blood when the heart contracts
muscular arteries
carry blood away from the heart to specific organs and tissues
arterioles
regulating blood flow throughout body
metartiole
connects arterioles and capillaries
capillaries
one cell thick cell wall easy exchange between blood and tissue cells
microcirculation
the flow of blood from arteriole to venule
true capillaries
receive blood flowing out of metartioles
acts as a valve to regulate blood flow
veins
vessel that carries blood to the heart
walls of blood vessels have 3 coats
tunica intima
tucina media
tunica externa
tunica intima
slick surface to decrease friction of blood flow
tunica media
bulky middle coat (thickest)
controls blood pressure
tunica externa
supports and protects the vessel
systematic circulation
blood flows from the left ventricle of the heart through the blood vessels to all parts of the body and back to the right atrium
pulmonary circulation
venous blood moves from the right atrium to the right ventricle to the pulmonary artery to the lung arterioles and capillaries, where gases are exchanged; oxygenated blood returns to the left atrium by way of the pulmonary veins; from the left atrium, blood enters the left ventricle
ascending aorta
arises from left ventricle, arches to the left as the Aortic arch
Right and left coronary arteries
serves the heart
intercostal arteries
supply muscles of the thorax
bronchial arteries
supply the lungs
esophageal arteries
supply the esophagus
phrenic arteries
supply the diaphragm
L gastric artery
supplies the stomach
splenic artery
supplies the spleen
common hepatic artery
supplies the liver
renal arteries
supply the kidney
gonadal arteries
supply the gonads
lumbar arteries
supply muscles of abdomen
inferior mesenteric artery
small artery supplying second half of large intestine
common iliac arteries
final branches of abdominal aorta
veins draining the head and arms empty into the
superior vena cava
veins draining the lower body empty into the
inferior vena cava
cephalic and basilic veins join at elbow by
median cubital vein (blood draw)
facial vein
drains skin and muskies of face
internal jugular vein
drains dural sinuses of brain
brachiocephalic veins
large, drains from the jugular veins, join to form the superior vena cava and enter the heart
great saphenous veins
longest vein in body,receive superficial drainage of the leg
hepatic portal vein
drains the digestive tract organs and carries blood through liver
cerebral arterial circle or circle of willis
surrounds base of brain
provides more than one route for blood to reach brain tissue
hepatic portal circulation
drains the digestive organs, spleen, and pancreas and delivers blood to liver through the hepatic portal vein
