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Lab 36

The Circulatory System: Heart and Vessels

QuestionAnswer
artery blood vessel carrying blood from the heart toward tissues
atrium cavity or chamber; here the receiving chamber of each half of the heart
capillary a microscopic blood vessel connecting arteries to veins
chordae tendineae cord-like structure anchoring cuspid valves to the papillary muscle in wall of ventricle
ductus arteriosus connection between pulmonary artery and aorta that shunts blood away from lungs and into general circulation; (found in fetus when lungs are absorbing oxygen from placenta)
ductus venosus connects umbilical vein of fetus to inferior vena cava
endothelium simple squamous epithelium that lines blood vessles
foramen ovale shunts blood from fetal right atrium to left atrium
ligamentum arteriosum ligamentous structure connecting pulmonary artery to aorta; vestigial remnant of the ductus arteriosus
lymph node a gland along the lymphatic system that filters microorganisms and produces lymphocytes
lymphocyte a specialized leucocyte (white blood cell) that fights disease by producing antibodies.
papillary muscle small muscle found in wall of ventricle; chordate tendineae are connected here.
portal system one or more blood vessels that connect a capillary bed in one organ with a second capillary bed in another organ
ventricle exit chamber of heart contains thick, muscular walls to pump through an artery capillary-vein circuit
Which heart chamber has the thickest wall? What is the advantage? the ventricle. Because it must pump blood from the heart to an artery-capillary-vein circuit, it's advantageous to have powerful muscular wall to force the blood out.
Created by: cmccartney2
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