The Respiratory System

A Breath of Fresh Air

Upper Structures

The structures of your upper respiratory system are :

  • Nose
  • Sinuses
  • Pharynx
  • Epiglottis
  • Larynx
  • Trachea

Continuous Upper Structure

  • Larynx - Voice box is the triangular chamber below pharynx
  • Vocal cords or Glottis
  • Sound is formed by vibration
  • Adam's Apple
  • Trachea - cough releases dust-laden mucous

Lower Structures

The Lower Respiratory System

  • Lungs - contains bronchial tubes, bronchioles, bronchi and aveoli
  • Pleura - most slippery membrane , doubled-wall sac
  • Pleura cavity is space where the lungs sit
  • Mediastinum - interpleural space and contains thymus , aorta , pulmonary artery and veins , esophagus , trachea and thoracic duct

Relationship with Immune System

  • The respiratory system is continuously at risk for infection or damage from external agents.
  • Foreign antigens - they provide sites where lymphocytes are sensitized to mount immune responses.


  • The respiratory system helps you breath in things you need
  1. Oxygen
  2. When you eat foods

Shaquandra Malloy

Come take a breath of fresh air :)