Respiratory system Terminology

• Ventilation


  Exchange of air between the atmosphere and the lungs
• Ventilation


  Achieved by breathing
• Breathing


  Take oxygen (from the air) into the body (lungs) and push carbon dioxide (from the body) out
• Breathing


  1. Inhalation - taking air in

  2. Exhalation - pushing air out
• Gas Exchange


  The exchange of oxygen and carbon dioxide gas between the alveoli and bloodstream via passive diffusion
• Gas Exchange


  1. Oxygen diffuses into the blood from the lungs

  2. Carbon dioxide diffuses into the lungs from the blood
• Gas Exchange


  1. Oxygen diffuses from the blood into the cells

  2. Carbon dioxide diffuses from the cells into the blood
• Cell Respiration


  The release of energy, from organic molecules (glucose), enhanced by oxygen (aerobic)
• Cell Respiration


  Occurs within mitochondria of cells to release the chemical energy (ATP) in food (glucose)
• Glucose + Oxygen = Carbon Dioxide + Water + Energy
• Cavity


  Spaces of the body that contain the internal organs