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"Cross" Your Heart

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6.Get larger as they approach the heart
9.Route by which oxygenated blood returns to the heart
11.Capillaries drain into these small vessels
13.Empties into the top portion of the right atrium
15.Number of chambers in the heart
18.Room air is 21% this
21.Separates the right ventricle from the pulmonary artery
23.Smallest arteries in the body
25.Separates the left ventricle from the aorta
26.Has two leaves or flaps
27.Separates the right atrium from the right ventricle
1.Get smaller as they get farther away from the heart
2.Pulmonary veins empty into this
3.Nature of blood as it returns to the heart from the lungs
4.Smallest veins in the body
5.Powerhouse of the heart...strongest of all chambers
7.Vessel by which deoxygenated blood leaves the heart
8.Nature of blood as it returns to the heart from the body
10.Empties into the lower portion of the right atrium
12.First chamber of the heart
14.Vessels that empty into the capillary bed
16.Tricuspid valve opens into this
17.Number of valves in the heart
19.Waste product of metabolism
20.Place at which gas exchange occurs
22.Largest artery in the body
24.Organs that take in oxygen and give off carbon dioxide

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