respiratory system

• The respiratory system is responsible for the exchange of gases (oxygen and carbon dioxide) in the bloodstream, the body cells, and the atmosphere
• Breathing process is essential to both human and animals in order to live
• Your breathing becomes heavy when you stop running because your body needs more oxygen
• One of the major reasons why you're alive is Oxygen
• Breathing in

  1. Air passes through nostrils

  2. Air travels through windpipe/Trachea

  3. Trachea branches out to Bronchi

  4. Bronchi carry air into each lung
• Nostrils

  • Tiny hair obstruct dust particles
• Trachea

  • Filters the air inhaled
• Bronchi

  • Tiny hair called Cilia move back and forth moving the mucus inside
• Mucus

  • Sticky substance that collects germs and other particles that might harm the lungs
• Lungs

  • Right lung has 3 lobes, left lung has 2 lobes (left lung is slightly smaller to give space to the heart)
  • Filled with small and spongy air sacs called alveoli where the exchange of oxygen and carbon dioxide happens
• Diaphragm

  • Dome-shaped muscle that contracts when you breathe in and expands when you breathe out
  • Separates the chest cavity from the abdominal cavity
• The lungs are the only organs that can float on water
• A person breathes approximately 20,000 times in one day
•  The air inhaled through the nose moves through the pharynx, larynx, trachea and into the lungs.