GRADE 6 SCIENCE by JAYCA MAE RECOPELACION https://padlet.com/jayrecopelacion/ivbwuxdu8a0owrqd DESCUSSION (LESSON PROPER) THE RESPIRATORY SYSTEM en-us 2021-12-30 11:30:38 UTC 2024-06-20 06:25:22 UTC hello@padlet.com https://padlet-uploads.storage.googleapis.com/1410505883/998a69e87020f5ccce44db8defe114fa/maxresdefault__1_.jpg GRADE 6 SCIENCE (Discussion) jayrecopelacion https://padlet.com/jayrecopelacion/ivbwuxdu8a0owrqd/wish/1968734239
The respiratory system has many different parts that work together to help you breathe. Each group of parts has many separate components.


Your airways deliver air to your lungs. Your airways are a complicated system that includes your:

  • Mouth and nose: Openings that pull air from outside your body into your respiratory system.
  • Sinuses: Hollow areas between the bones in your head that help regulate the temperature and humidity of the air you inhale.
  • Pharynx (throat): Tube that delivers air from your mouth and nose to the trachea (windpipe).
  • Trachea: Passage connecting your throat and lungs.
  • Bronchial tubes: Tubes at the bottom of your windpipe that connect into each lung.
  • Lungs: Two organs that remove oxygen from the air and pass it into your blood.

From your lungs, your bloodstream delivers oxygen to all your organs and other tissues.


Muscles and bones help move the air you inhale into and out of your lungs. Some of the bones and muscles in the respiratory system include your:

  • Diaphragm: Muscle that helps your lungs pull in air and push it out.
  • Ribs: Bones that surround and protect your lungs and heart.

When you breathe out, your blood carries carbon dioxide and other waste out of the body. Other components that work with the lungs and blood vessels include:

  • Alveoli: Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.
  • Bronchioles: Small branches of the bronchial tubes that lead to the alveoli.
  • Capillaries: Blood vessels in the alveoli walls that move oxygen and carbon dioxide.
  • Lung lobes: Sections of the lungs — three lobes in the right lung and two in the left lung.
  • Pleura: Thin sacs that surround each lung lobe and separate your lungs from the chest wall.

Some of the other components of your respiratory system include:

  • Cilia: Tiny hairs that move in a wave-like motion to filter dust and other irritants out of your airways.
  • Epiglottis: Tissue flap at the entrance to the trachea that closes when you swallow to keep food and liquids out of your airway.
  • Larynx (voice box): Hollow organ that allows you to talk and make sounds when air moves in and out.
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