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37.1 The Circulatory System <br />
Myocardium <br />Thick middle muscle layer of the heart; pumps blood through the circulatory system.<br />
Atrium<br />Upper chamber of the heart that receives and holds blood that is about to enter the ventricle.<br />
Ventricle<br />Lower chamber of the heart that pumps blood out of the heart.<br />
Pulmonary Circulation <br />Pathway of circulation between the heart and the lungs.<br />
Systemic Circulation<br />Pathway of circulation between the heart and the rest of the body except the lungs.<br />
Valve <br />Flap of connective tissue between an atrium and a ventricle, or in a vein, that prevents backflow of blood.<br />
Pacemaker <br />Small group of cardiac muscle cells in the right atrium that “set the pace” for the heart as a whole; also...
Aorta <br />Large blood vessel in mammals through which blood travels after it leaves the left ventricle. <br />
Artery <br />Large blood vessel that carries blood from the heart to the tissues of the body.<br />
Capillary<br />Smallest blood vessel; brings nutrients and oxygen to the tissues and absorbs carbon dioxide and waste prod...
Vein <br />In plants, a cluster of vascular tissue in leaves; in animals, a blood vessel that returns blood to the heart.<...
Atherosclerosis<br />Condition in which fatty deposits called plaque build up on the inner walls of the arteries.<br />
Key Concept <br />The human circulatory system consists of the heart, a series of blood vessels, and the blood that flows ...
Key Concept<br />As blood flows through the circulatory system, it moves through three types of blood vessels—arteries, ca...
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Biology 37.1

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Transcript of "Biology 37.1"

  1. 1. 37.1 The Circulatory System <br />
  2. 2. Myocardium <br />Thick middle muscle layer of the heart; pumps blood through the circulatory system.<br />
  3. 3. Atrium<br />Upper chamber of the heart that receives and holds blood that is about to enter the ventricle.<br />
  4. 4. Ventricle<br />Lower chamber of the heart that pumps blood out of the heart.<br />
  5. 5. Pulmonary Circulation <br />Pathway of circulation between the heart and the lungs.<br />
  6. 6. Systemic Circulation<br />Pathway of circulation between the heart and the rest of the body except the lungs.<br />
  7. 7. Valve <br />Flap of connective tissue between an atrium and a ventricle, or in a vein, that prevents backflow of blood.<br />
  8. 8. Pacemaker <br />Small group of cardiac muscle cells in the right atrium that “set the pace” for the heart as a whole; also known as the sinoatrial node.<br />
  9. 9. Aorta <br />Large blood vessel in mammals through which blood travels after it leaves the left ventricle. <br />
  10. 10. Artery <br />Large blood vessel that carries blood from the heart to the tissues of the body.<br />
  11. 11. Capillary<br />Smallest blood vessel; brings nutrients and oxygen to the tissues and absorbs carbon dioxide and waste products.<br />
  12. 12. Vein <br />In plants, a cluster of vascular tissue in leaves; in animals, a blood vessel that returns blood to the heart.<br />
  13. 13. Atherosclerosis<br />Condition in which fatty deposits called plaque build up on the inner walls of the arteries.<br />
  14. 14. Key Concept <br />The human circulatory system consists of the heart, a series of blood vessels, and the blood that flows through them.<br />
  15. 15. Key Concept<br />As blood flows through the circulatory system, it moves through three types of blood vessels—arteries, capillaries, and veins.<br />
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