Vocabulary test 10.1 Crossword
                    
                    
                    
                    
                    
                    
                    
                    
                    
                    
 
 
Down: 1)  microscopic blood vessel, smallest unit of the circulatory system.2) either of the two lower chambers on each side of the heart that receive blood from the atria and in turn force it into the arteries4) the main trunk of the arterial system, conveying blood from the left ventricle of the heart to all of the body except the lungs. 6)  a blood vessel that conveys blood from the heart to any part of the body. 9) one of the system of branching vessels or tubes conveying blood from various parts of the body to the heart. Across: 3)  a hollow, pumplike organ of blood circulation, composed mainly of rhythmically contractile smooth muscle, located in the chest between the lungs and slightly to the left and consisting of four chambers.5) The heart and blood vessels considered as a whole.7) either of the two upper chambers on each side of the heart that receive blood from the veins and in turn force it into the ventricles. 8)  a membranous fold or other structure that controls the flow of a fluid, as one that permits blood to flow in one direction only.
 

 

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