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Circulatory System Vocab Words

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Question
Answer
Heart   The organ that pumps the blood through the body.  
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Blood   A tissue that is made up of cells, fluid, and other substances.  
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Blood Vessels   Tubes that transport blood and nutrients to other parts of the body.  
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Hemiglobin   The oxygen carrying pigment in the red blood cells of the blood.  
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Atrium   A chamber of the heart that receives blood from the body.  
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Ventricle   One of two large, muscular chambers that pump blood out of the heart.  
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Cardiac Pacemaker   A group of cells at the top of the right atrium which starts a signal.  
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Arteries   Blood vessels that carry blood away from the heart to all parts of the body.  
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Veins   Blood vessels that carry blood from all parts of the body back to the heart.  
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Capillaries   Tiny blood vessels that connect arteries to veins.  
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Red Blood Cells   Full of hemoglobin and carry oxygen to the body. Also return carbon dioxide to the lungs.  
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White Blood Cells   BLood cells that protect the body from disease.  
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Platelets   Cell fragments that cause blood to clot, which stops blood loss.  
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Septum   A wall, dividing a cavity or structure into smaller ones.  
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