2. THE CARDIOVASCULAR SYSTEM

3. Your “real” heart

4.  The muscular pump that makes the cardiovascular system work. It is made up of cardiac muscle and provides the power needed for life.  Your heart will beat an average of 2 ½ billion times in a lifespan.  You have approximately 5 liters of blood in your body HEART

5. To pump blood to all parts of the body providing food and oxygen to all its cells. Essential question – What is the function of the heart?

6.  Blood is the fluid of life. It transports oxygen and carbon dioxide, nourishment, and disease fighters to all parts of the body. BLOOD

7.  The liquid portion of the blood in which all other cells, nutrients, and hormones are suspended.  Plasma is 90% water PLASMA

8.  RED CELLS – carry oxygen to all parts of the body.  HEMOGLOBIN is the protein in RBC’s that the O2 combines to. It give blood its red color.  WHITE BLOOD CELLS – are part of your immune system and fight disease.  PLATELETS – clot your blood to stop bleeding. TYPES OF BLOOD CELLS

9. BLOOD VESSELS – YOUR TRANSPORTATION SYSTEM

10.  Carry oxygenated blood away from the heart  Two major/important arteries are:  Aorta – largest artery in body that takes blood away from the heart  Pulmonary Arteries – carry ‘unoxygenated’ blood away from heart and to the LUNGS to pick up O2. ARTERIES

11.  Veins return unoxygenated blood back to the heart.  Two major veins are:  Superior vena cava  Inferior vena cava VEINS

12. CAPILLARIES – smallest vessel in the body, where O2 & CO2 is exchanged

13.  The force of blood against the arterial walls  120/80 is an average BP  HYPERTENSION = a high blood pressure count BLOOD PRESSURE

14.  The number of times your heart beats per minute.  The average heart beats 70-80 times in 60 seconds.  Your heart is a muscle, so if you exercise it (aerobically), your heart will get stronger and not have to work so hard. A trained athlete’s heart would beat LESS than 70-80 times. YOUR “PULSE”

15. HEART ANATOMY

16.  Atrium – the upper / receiving chambers of the heart  Ventricle – the lower / pumping chambers of the heart  Valves – tiny flaps of skin that open and close like one-way doors  Septum – the muscular wall that divides the heart into a right and left side HEART ANATOMY TERMS

17.  PULMONARY CIRULATION – BLOOD THAT FLOWS FROM THE HEART – TO THE LUNGS – BACK TO THE HEART  SYSTEMIC – BLOOD THAT FLOWS TO EVERY SINGLE PART OF THE BODY except the lungs  CORONARY – SUPPLIES BLOOD ONLY TO THE HEART TYPES OF CIRCULATION