Respiratory

• Functions


  Inhalation and Exhalation

  External Respiration

  Internal Respiration
• Upper Respiration


  Air breathed in through nostrils into nasal cavity

  Hairs called cillia line the nasal cavities to trap dust

  Inside of nose and throat lined with mucus

  Passes into Pharynx

  Larynx connects to pharynx with trachea

  Epiglottis prevents food into trachea
• Lower Respiration

  Air Passes into trachea then into bronchi

  Each bronchi goes into a king where it divides into brnchioles

  Capillaries surround alveoli ready to absorb oxygeb

  Co2 retraces steps of air to go back up through nose and mith
• Mouth


  When nose is blocked oxygen needed
• Nose


  Cilia line nasal cavity

  filter air and trap dust
• Pharynx 


  Throat
• Larynx


  Connecting tube between pharynx and the trachea
• Epiglottis 


  Small flap that closes over trachea when eating and drinking
• Diaphragm


  Relaxes to aid respiration
• Trachea - L


  Tubes that carries air to the lungs
• Lungs - L

  Contains alveoli
• Primary Bronchi


  Tubes carrying air from trachea into bronchioles
• Bronchioles 


  Filters partciles
• Alvieoli 


  1 Cell thick

  Gas Exhcnage
• Pleural membranes


  Surrounds each lung to protect from friction
• Internal Respiration

  Deep down in the body

  Gases exchange

  Cells take o2 and give back co2
• External Respirtation


  (Breathing)

  o2 inhaled through mouth

  Diffuses through thin lining of alveoli into capillaries

  Newly oxygenated blood transported via pulmonary viens
• Pathologies

  Asthma

  Hayfever

  Sinusitus

  Influenza