Respiratory system

• Respiratory system


  A series of organs responsible for taking in oxygen and removing carbon dioxide
• Nose


  • Moisturizes, purifies, and cleans air, Mucous and tiny hairs remove dust/other particles
• Epiglottis


  Prevents food from going down the airway
• Trachea


  • Lets air travel down to lungs
• Bronchus


  • Bronchi transport air to and from lungs
• Bronchioles


  • Carry air into the alveoli
• Alveoli


  • Carry out gas exchange
• Ribcage


  • Protects heart and lungs
• Intercostal muscles


  • Help with movement of ribcage while breathing
• Lungs


  • Respiratory organs, located behind the ribcage
• Diaphragm


  • The muscle at the base of the lungs that contracts/relaxes, forcing air in and out of lungs
• Inhalation


  1. Intercostal muscles contract, causing ribs to move up and out

  2. Diaphragm contracts and moves downwards

  3. Chest increases in size

  4. Lungs expand

  5. Pressure inside lungs falls
• Exhalation


  1. Intercostal muscles relax, causing ribs to move down

  2. Diaphragm relaxes and moves upward

  3. Chest decreases in size

  4. Lungs shrink

  5. Pressure inside lungs increases
• Alveoli


  A cluster of tiny air sacs at the tip of each bronchiole where carbon dioxide and oxygen are exchanged between them and the surrounding capillaries
• Oxygen is inhaled into the alveoli


  It diffuses into the alveoli from where it is transported by the circulatory system into cells
• Carbon dioxide is produced by cells


  It diffuses into the alveoli and is exhaled from the body by the respiratory system
• The respiratory system


  Interacts with the circulatory system to transport oxygen and remove carbon dioxide