Sci 9 Quarter 1

• Respiratory System - This is also known as "Human Breathing System". This organ system is responsible for taking oxygen and expelling carbon dioxide.
• The  Parts of Respiratory System

  • Nose

  • Mouth

  • Nasal Cavity

  • Larynx

  • Pharynx

  • Trachea

  • Lungs

  • Bronchi

  • Bronchioles

  • Alveoli

  • Diaphragm
• Nose and Mouth - the entrance of oxygen in our body.
• Nasal Cavity or Nasal Passageway - the air passing this part is warm, damp, and clean.
• Pharynx - is our throat and it supports our respiratory and digestive systems.
• Larynx - is our voice box.
• Trachea - it is also known as wind pipe. It is an empty tube that serves as passageway of air into the lungs.
• Lungs - are the main organ of the "Respiratory System".
• Bronchi - the two branching tubes that connect the trachea to the lungs.
• Bronchioles - these are the hairlike tubes that connect to alveoli.
• Alveoli - these are the small air sacs that allow gas exchange in the lungs.
• Epiglottis - this is usually upright at rest allowing air to pass into the larynx and lungs. This is part is important for digestive system and respiratory system.
• When we inhale oxygen enters our body.
• When we exhale carbon dioxide exists to our body.
• When we inhale ribs move up and outward and the diaphragm moves in and chest space decreases.
• When we exhale ribs moves down and inward and the diaphragm moves up and chest space increases.