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20 terms

phlebotomy(chapter 7)

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pulmonary circulation
carries blood between the heart and the lungs for gas exchange.
systemic circulation
carries blood between the heart and the rest of the body's tissues.
arteries
carry blood from the heart to capillary beds, where exchange occurs.
veins
return blood to the heart
pericardium
which supports and lubricates the heart during contraction.
epicardium
outer layer of the heart consists of the epithelial cells and underlying fibrous connective tissues.
coronary arteries
which supply oxygen to the heart, are embedded in this layer.
myocardium
the middle layer is composed of cardic muscle.
endocardium
the innermost layer is made up of endothelial cells, modified epithelium that is continuous with endothelium lining the blood vessels that enter and exit the heart's chambers.
the four chambers of the heart
left and right atria and left and right ventricles.
the heart has four valves
right atrioventricular valve, pulmonary semilunar valve, left atrioventricular valve, aortic semilunar valve.
tunica adventitia
outer layer is composed of connective tissue.
tunica media
middle layer is made of smooth muscle.
tunica intima
inner layer, is composed of a single layer of endothelial cells.
venules
capillary blood enters the smallest veins
veins
carry blood back toward the heart
plasma
blood is composed of the fluid portion and cellular components, called the formed elements
blood
an average adult has 5 to 6 L of blood
interstitial fluid
lymphatic fluid is derived from the fluid between cells.
allergy
is an inappropriately severe immune reaction to an otherwise harmless substance.