Science Chapter 3 Study Guide

  1. The body system that consists of the heart, blood vessels, and blood.
    Cardiovascular System (Circulatory System)
  2. Each of the 2 upper chambers of the heart that receives blood that comes into the heart.
    Atrium
  3. Each of the 2 lower chambers of the heart that pumps blood out of the heart.
    Ventricle
  4. A flap of tissue in the heart that prevents blood from flowing backward.
    Valve
  5. A group of cells located in the right atrium that sends out signals that make the heart muscle contract and that regulates heart rate.
    Pacemaker
  6. A blood vessel that carries blood away from the heart.
    Artery
  7. A tiny blood vessel where substances are exchanged between the blood and the body cells.
    Capillary
  8. A blood vessel that carries blood back to the heart.
    Vein
  9. The largest artery in the body; receives blood from the left ventricle.
    Aorta
  10. An artery that supplies blood to the heart itself.
    Coronary artery
  11. A hollow, muscular organ that pumps blood throughout the body.
    Heart
  12. The liquid part of blood.
    Plasma
  13. A cell in the blood that takes up oxygen in the lungs and delivers it to the cells elsewhere in the body.
    Red blood cell
  14. An iron- containing protein that binds chemically to oxygen molecules; makes up most of red blood cells
    Hemoglobin
  15. A blood cell that fights disease.
    White blood cell
  16. A cell fragment that plays an important part in forming blood clots.
    Platelet
  17. A network of veinlike vessels that returns the fluid that leaks out of blood vessels to the bloodstream
    Lymphatic system
  18. The fluid that the lymphatic system collects and returns to the bloodstream.
    Lymph
  19. A small knob of tissue in the lymphatic system that filters lymph, trapping bacteria and other microorganisms that cause disease.
    Lymph node
  20. A condition in which an artery wall thickens as a result of the buildup of fatty material.
    Atherosclerosis
  21. A disorder in which a person's blood pressure is consistently higher than normal; also called high blood pressure.
    Hypertension
  22. A condition in which blood flows to part of the heart muscle is blocked, causing heart cells to die.
    Heart attack
  23. A compound of the sterol type found in most body tissues.
    Cholesterol
  24. Protein formed during the clotting of blood.
    Fibrin
  25. What is the flow of blood through the heart and body?
    In the first loop the blood travels from the heart to the lungs and then to the heart, in the second loop the blood is pumped from the heart throughout the body and then returns to the heart.
  26. What is blood pressure? How do you measure it?
    Blood pressure is the pressure that is exerted by the blood against the walls of blood vessels. Blood pressure is measured with an instrument called a sphygmomanometer.
  27. What are the 4 components of blood and the functions of each?
    Red blood cells, white blood cells, platelets, and plasma.
  28. Describe behaviors that can help keep your cardiovascular system healthy.
    You should exercise regularly; eat a balanced diet that is low in saturated fats and trans fats, cholesterol, and sodiums, and avoid smoking.
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Science Chapter 3 Study Guide
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Vocab and Concepts
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