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Circulatory system
 

Circulatory system

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    Circulatory system Circulatory system Presentation Transcript

    • Circulatory System
      6th Grade Science
    • I. Function
      A. Deliver needed materials to cells
      B. Removing waste from cells
      C. Fighting off infection
    • II. Parts
      Heart
      1. Muscle to pump blood
      2. Four chambers
      i. 2 Atrium (top)
      ii. 2 Ventricle (bottom)
      3. Valves to separate flow
    • 4. Pathway
      From Body
      From Lung
      RA
      LA
      RV
      LV
      To Lung
      To Body
    • 4. Pathway
      ii. Pulmonary Circuit
      a. Send CO2 blood from right side heart to lungs
      b. Lungs remove CO2 and replace with O2
      c. Return to left side of heart
    • 4. Pathway
      iii. Systemic Circuit
      a. Send O2 blood from left side heart to body
      b. Cells remove O2 and replace with CO2
      b. Return to right side of heart
    • 5. Heart Beat
      i. Top heart contracts together
      a. Valves close (Lub)
      ii. Bottom heart contracts together
      a. Larger Valves close (Dub)
    • B. Blood Vessels
      Arteries
      Carry blood away from heart
      Veins
      Carry blood toward the heart
      Capillaries
      i. Where body exchanges materials
    • 4. Controlling blood flow
      i. Pulsing blood flow
      a. Heart beats (high number) - top
      b. Heart relaxes (low number) – bottom
      c. Healthy numbers 120/80
    • ii. Veins
      a. Valves to help return blood
      b. Muscles help return blood
    • III. Diseases
      A. Atherosclerosis
      B. Heart Attack
      C. Hypertension 140/90