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24 Cards in this Set

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  • Back
arteries
vessel carrying bood away from the heart
arterioles
small branches of the artery
capillaries
tiny vessels that connect arterioles and venules
venules
small blood vessels that collect blood from the capillaries and join to form veins
veins
carrying blood toward the heart
tunica externa
the outer most layer of blood vessels(connective tissue)thinner in arteries than viens
tunica media
the muscular middle layer found in blood vessels, it is more muscular in the atreries than the viens(smooth muscle & elastic tissue)
tunica intima
endothelium that lines blood vessels
endothelium
squamous epithelial cells that line the inner surface of the entire circulatory system and the vessels of the lymphatic system
precapillary sphincter
smooth muscle cells that guard the entrance to the capillary
systemic circulation
blood flow from the left ventricle to all parts of the body and back to the right atrium
pulmonary circulation
venous blood flow from the right atrium to the lung and returning to the left atrium
placenta
anchors the developing fetus to the uterus & provides a "bridge" for the exchange of nutrients and waste products between the mother and developing baby
umbilical cord
flexible structure connecting the fetus to the placenta, which allows the umbilical arteries and vein to pass
umbilical arteries
2 small arteries that carry O2 poor blood from the developing fetus to the placenta
unbilical vein
a large vein carrying O2 rich blood from the placenta to the developing fetus
ductus venosus
a continuation of the umbilical vein that shunts blood returning from the placenta past the fetus' developing liver directly into the inferior vena cava
hepatic portal circulation
the route of blood flow through the liver
foramen ovale
shunts blood from the right atrium directly into the left atrium allowing most blood to bypass the baby's developing lungs
ductus arteriosus
connects the aorta and the pulmonary artery, allowing most blood to bypass the fetus' developing lungs
blood pressure gradient
the difference between 2 blood pressures in the body
blood pressure
pressure of blood in the blood vessels, expressed as systolic pressure over diastolic pressure
central venous pressure
venous blood pressure within the right atrium that influnces the pressure in the large peripheral veins
pulse
is an artery expanding and then recoiling alternately