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  1. Interventricular Septum
    Separates R and L ventricles of heart
  2. Right Atrium
    Gathers deoxygenated blood from body.
  3. Left Artium
    Gathers reoxygenated blood from lungs
  4. Right Ventricle
    Pumps deoxygenated blood to lungs
  5. Left Venticle
    Pumps reoxygenated blood to body
  6. Heart
    -made of
    • Cardiac Muscle
    • -Adult fist, 300 grams or 10 ounces
    • -myofibrils containing actin and myosin. Surrounded by sarcolemma.
  7. Cardiac Muscles
    -Compared to skeletal
    -Built in
    -Average beats per min
    • -Shorter and more tightly connected than skeletal muscles
    • -Have built in contraction rhythm. Fibers with highest rhythm determine heart rate.
    • (Aver. 70-80 min)
  8. Cardiac Muscle Conduction Sytstem
    -2 Nodes
    • -Sinoatrial Node in R Atrium=Pacemaker-initiates beat
    • -Atrioventricular Node receives and delays impulse and then passes on to ventricles
  9. Mediastinum
    Space in chest between lungs containing containing all internal organs except lungs
  10. Interventricular Septum
    Separates R and L ventricles
  11. Stroke Volume
    • Amount of blood pumped out each contraction of a ventricle
    • -Adult, 75 to 80 ml per beat
  12. Cardiac Output
    Combination of bpm and stroke volume
  13. Blood
    -Functions (TRP)
    • -Transports:
    • O2 and nutrients to tissue
    • Waste products from tissue
    • Hormones to organs and tissue
    • Heat throughout body
    • -Regulates body temp and acid balance (ph) in body
    • -Protects:
    • Body from excessive bleeding by clotting
    • Contains specialized immune cells to help fight disease and sickness (can also spread disease)
  14. Blood
    -% of body weight
    • -8% of total body weight
    • -5L (1.5 Gal)
  15. Arteries
    -Size and durability
    -Branch out into
    • -Large and elastic
    • -At points leaving heart
    • -Branch out into medium sized muscle arteries
  16. Arterioloes
    Small terminal branches of arteries
  17. Capillaries
    • Smallest blood vessel
    • -where O2, nutrients, hormones, and waste exchange with tissue
  18. Venules
    Collect blood from capillaries to send to heart for cleaning

    -Merge with other venules to form veins
  19. Veins
    Transport blood from venules to heart
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