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MArtini cardiovascular 2


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Pulmonary circuit
arteries carry deoxygenated blood in this
Lymphatic system
functions include production, maintenance, and distribution of lymphocytes
fluid connective tissue
Muscular arteries
distribute blood to skeletal muscles and organs (medium sized)
Tunica externa
outermost layer of blood vessels that forms a connective tissue sheath around the vessel
relaxation of blood vessels
the arteries of the _______ circuit carry deoxygenated blood
Fossa ovalis
remnant of the foramen ovale
Lymphatic system
function include the provision of an alternate route for transport of hormones, nutrients and waste products
Ligamentum arteriosum
remnant of the ductus arteriosus
Large veins
large vessels that transport large volumes of blood into the heart
contraction of blood vessels
Ductus venosus
during fetal development - vessel that collects blood from the veins of the liver and from the umbilical vein and delivers it to the inferior vena cava
Systemic circuit
supplies capillary beds in all parts of the body not supplied by the pulmonary circuit
Medium-sized veins
collect blood from skeletal muscles and organs (muscular)
Tunica media
Layer of blood vessel responsible for vasodilation and vasoconstriction
smallest veins that collect blood from capillaries
Round ligament
remnant of the umbilical vein
Elastic arteries
large vessels that transport large volumes of blood away from the heart - they are able to stretch and recoil with pressure changes
Foramen ovale
during fetal development - interarterial opening which allows blood to flow freely from the right to left atrium - bypassing pulmonary circulation
Systemic circuit
begins at the aortic valve and ends at the entrance to the right atrium - contains 84% of body's blood volume at any given moment
Inferior vena cava
the liver is drained by this blood vessel
Hepatic portal vein
composed of inferior mesenteric, splenic, and superior mesenteric veins
Tunica intima
innermost layer of blood vessel - includes the endothelial lining of the vessel and underlying layer of connective tissue containing a variable amount of elastic fibers
smallest, most delicate of vessels - only blood vessels whose walls permit exchange between the blood and surround interstitial fluids
Umbilical arteries
during fetal development - deliver blood from the fetus to the placenta
Tunica media
middle layer of blood vessels that contains concentric sheets of smooth muscle tissue in a framework of loose connective tissue
Umbilical veins
during fetal development - return O2-rich blood and nutrients from the placenta to the fetus
composed of interstitial fluid, lymphocytes, and macrophages
Lymphatic system
functions include maintenance of normal blood volume and elimination of local variations in the chemical composition of interstitial fluid
smallest arteries that can change their diameter in response to conditions in the body
Ductus arteriosus
during fetal development - small bypass between the pulmonary and aortic trunks - allows for bypass of pulmonary circulation
Lymphatic vessels
deliver lymph to the venous system
collect blood from all tissues and organs and return it to the heart

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