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