Test Four Crossword
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
 
 
Down: 2) Relatively thick middle layer of smooth muscle and elastic tissue.3) Because it regulates the heartbeat4) The blood moves to an area where gas exchange is needed5) Allow electrical current to flow from cell to cell.6) Control the blood flow through a capillary bed8) About 0.85 seconds10) Working phase (contraction)11) Blood pressure rises14) Pumps blood to the rest of the body.17) Lower body drains19) 70% of the blood is in the veins.20) Controls internal organs22) Innermost layer of the arterial wall composed of thin cells. 23) An extremely narrow, microscopic tube with a wall composed only of endothelium27) Right and left atria; left and right ventricles34) Size of two hands placed together. Across: 1) Travels to smaller Purkinje fibers and both the AV bundle and the Purkinje fibers are specialized muscle fibers that cause efficient ventricle contraction.7) bag around the heart.9) Arteries, capillaries, and veins.12) Pumps blood to the lungs13) Drains head and upper body15) Networks of many capillaries16) Depends on the beating of the heart, removes waste products from tissue fluid, brings tissue fluid to the oxygen and nutrients cells require to continue their existence, drops off carbon dioxide and picks up oxygen at the lungs.18) With leaky valves21) Small arteries barely visible to the naked eye.24) Due to improper closing of valves25) Increasing pressure of blood26) 60-80 times a minute28) Since the walls are thinner they can expand more and have more muscle but doesn't give a quick rebound29) Small veins that drain blood from the capillaries and then join to form a vein.30) Have the same three layers as arteries. However, a vein is thinner than that of an artery31) Relax32) Formed by a single layer of epithelial cells with a basement membrane. 33) Connective tissue.35) Transport the blood from the heart into arteries, capillaries, and veins36) Blood pressure falls37) Initiates the heartbeat38) Heartbeat
 

 

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