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CIRCULATORY SYSTEM<br />7SCIENCE: Thurs. Jan. 13 and Fri. Jan. 14<br />
Review<br />What things that humans need to survive?<br />Food – nutrients!<br />Water<br />Air – oxygen <br />Another nam...
What is the purpose of the circulatory system?<br />Transports importantsubstances to all parts of your body through your ...
HEART<br />Made of cardiac muscle<br />Located between your lungs and protected by bones <br />2 upper chambers called atr...
BLOOD VESSELS<br />Veins <br />Returns blood to heart<br />Valves keep blood moving towards the heart<br />Contains blood ...
Circulation (movement) of Blood through the Heart<br />To watch an animation of the heart pumping:<br />Click here!<br />Y...
REVIEW: organs of the circulatory or cardiovascular system<br />Heart<br />Veins<br />Arteries<br />Capillaries<br />Blood...
HEART<br />During a heartbeat, both atria contract then both ventricles contract<br />Valves separate the chambers <br />p...
BLOOD CIRCULATION<br />Blood continuously moves  around your body<br />3 types:<br />Pulmonary: blood flows from heart to ...
BLOOD CIRCULATION<br />Coronary: blood that moves only in and around the heart <br />If this circulation stops or is block...
BLOOD PRESSURE<br />Heart pumps blood through your blood vessels there is pressure on the inside<br />Like water flowing t...
CARDIOVASCULAR DISEASE<br />Heart disease is the #1 cause of death in Colombia<br />Stroke and heart attacks count for ove...
CARDIOVASCULAR DISEASE<br />Hypertension <br />High blood pressure<br />Atherosclerosis can cause hypertension, i.e. block...
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Cardiovascular system

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Cardiovascular system

  1. 1. CIRCULATORY SYSTEM<br />7SCIENCE: Thurs. Jan. 13 and Fri. Jan. 14<br />
  2. 2. Review<br />What things that humans need to survive?<br />Food – nutrients!<br />Water<br />Air – oxygen <br />Another name for the circulatory system is cardiovascular system <br />Includes: <br />Heart<br />Blood<br />Blood vessels (veins and arteries)<br />
  3. 3. What is the purpose of the circulatory system?<br />Transports importantsubstances to all parts of your body through your blood <br />Moves oxygen and nutrients to cells <br />Removes carbon dioxide and wastes from the cells <br />
  4. 4. HEART<br />Made of cardiac muscle<br />Located between your lungs and protected by bones <br />2 upper chambers called atria<br />Right atrium<br />Left atrium<br />2 lower chambers called ventricles<br />Right ventricle<br />Left ventricle<br />
  5. 5. BLOOD VESSELS<br />Veins <br />Returns blood to heart<br />Valves keep blood moving towards the heart<br />Contains blood low in oxygen<br />Arteries<br />A = AWAY from the heart<br />Thick elastic walls<br />Capillaries<br />Connects veins and arteries <br />Only one cell thick!<br />E.g. in your eyes when you are tired <br />
  6. 6. Circulation (movement) of Blood through the Heart<br />To watch an animation of the heart pumping:<br />Click here!<br />You can speed up/slow down the pumping of the heart here.<br />
  7. 7. REVIEW: organs of the circulatory or cardiovascular system<br />Heart<br />Veins<br />Arteries<br />Capillaries<br />Blood <br />
  8. 8. HEART<br />During a heartbeat, both atria contract then both ventricles contract<br />Valves separate the chambers <br />prevents blood from flowing between the atrias or ventricles<br />
  9. 9. BLOOD CIRCULATION<br />Blood continuously moves around your body<br />3 types:<br />Pulmonary: blood flows from heart to the lungs to get oxygen<br />Systemic: blood flows away from the heart to rest of body <br />Veins<br />Arteries<br />
  10. 10. BLOOD CIRCULATION<br />Coronary: blood that moves only in and around the heart <br />If this circulation stops or is blocked, oxygen cannot get to the heart<br />= heart attack <br />
  11. 11. BLOOD PRESSURE<br />Heart pumps blood through your blood vessels there is pressure on the inside<br />Like water flowing through a hose<br />Called blood pressure<br />As pressure increases and decreases, this is your pulse<br />Highest in your arteries: WHY?<br />NORMAL: 65 – 80 beats/minute<br />
  12. 12. CARDIOVASCULAR DISEASE<br />Heart disease is the #1 cause of death in Colombia<br />Stroke and heart attacks count for over 1/3 of adult deaths <br />Atherosclerosis <br />Fat deposits on inside of arteries block blood flow<br />Caused by: eating too much fat and foods high in cholesterol<br />
  13. 13. CARDIOVASCULAR DISEASE<br />Hypertension <br />High blood pressure<br />Atherosclerosis can cause hypertension, i.e. blocked arteries can increase the pressure inside a blood vessel <br />Caused by: too much salt and fat<br />SOLUTIONS?<br />Good diet and exercise<br />Regular doctor appointments!<br />

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