Human Respiratory System dowload from slde share

Human Respiratory System dowload from slde share

• 1.
  NAME – GIRIRAJ Class– 7th (A) Roll NO - 25
• 2.
  The Human Gas Exchange System
• 3.
  oxygen Our respiratory system isresponsible for bringing air into the body, from which we can get oxygen.
• 4.
  carbon dioxide It also movesair back out of the body—the exhaled air contains more of our waste gas, carbon dioxide.
• 5.
  But how dowe get oxygen from the air to our body cells and get carbon dioxide out?
• 6.
  air Let’s follow the journeyof a breath of air, starting with the moment you inhale.
• 7.
  Air enters thebody through the nose and mouth, where it is filtered and warmed. nasal cavity oral cavity pharynx larynx
• 8.
  trachea primary bronchi Air then passesthrough the trachea and the two primary bronchi. These structures are held open by rings of cartilage.
• 9.
  bronchiole alveoli Each bronchus then branchesmany times into bronchioles, terminating at tiny air-filled sacs called alveoli.
• 10.
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