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a system in three-chambered hearts that forms a forked artery and leads to the lungs and skin
a part of the circulatory system which carries blood to the rest of the body and back to the right atrium
a part of the circulatory system that is responsible for gas exchange in the lungs
the period during which the mammalian heart relaxes, allowing the heart chambers to fill with blood
parts of the heart between each atrium and ventricle that are snapped shut when blood is forced against them as the ventricles contract
parts of the heart at the exit of the aorta and pulmonary artery that are forced open by ventricular contraction, and close when the ventricles relax
body fluid found in sinuses or spaces between organs that bathes the internal tissues, providing for chemical exchange
outer connective tissue, middle muscle, inner lining of endothelium
the layers of an artery or vein wall
pressure created from the force exerted against the wall of a blood vessel during systole
pressure created by the recoiling of the stretched elastic arteries during diastole
the contraction of smooth muscles in arteriole walls; increases resistance, thus increases blood pressure
the relaxation of smooth muscles in arteriole walls; decreases resistance, thus decreases blood pressure
a liquid matrix that makes up about 55% of blood; consists of a large variety of solutes dissolved in water
cells that transport oxygen; red blood cells; lack mitochondria and generate ATP by anaerobic metabolism
pinched-off fragments of large cells in the bone marrow that are involved in blood clotting
the condition of high blood pressure; is thought to damage the endothelium and initiate plaque formation
a gas will diffuse from a region of ________ partial pressure to a region of ________ partial pressure
an arrangement in which the diffusion gradient favors the movement of oxygen into the blood along the length of the capillary
tiny air tubes, which branch throughout the body and come into contact with nearly every cell
invaginated respiratory surfaces restricted to one location from which oxygen is transported by the circulatory system
a type of breathing that lowers the floor of the oral cavity, expanding it and drawing air into the mouth; used by amphibians
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