Respirtaion

Cards (10)

  • Lungs
    Function: Get the oxygen that we need from the air all around us into our bloodstream where it can be transported to the rest of the body
  • Air flow through the lungs
    1. Mouth/nose
    2. Trachea
    3. Bronchi
    4. Bronchioles
    5. Alveoli
  • Alveoli
    • Small sacks arranged like bunches of grapes
    • Site of gas exchange
  • Alveolus
    • One layer of very thin cells
    • Large surface area
    • Moist walls
  • Oxygen concentration in alveoli
    Higher than in blood capillaries
  • Carbon dioxide concentration in blood
    Higher than in alveoli
  • Carbon dioxide is dissolved in blood plasma, not carried by red blood cells
  • Blood keeps moving throughout the entire process with a constant supply of deoxygenated blood entering the capillaries and oxygenated blood leaving
  • Breathing rate
    Calculated by dividing the number of breaths taken by the time in minutes
  • Breathing rate changes during exercise