The Respiratory System Why do astronauts wear space suits and carry oxygen when they go out in space? Why do deep sea divers take oxygen with them on a dive?

The Respiratory System Functions The respiratory system moves oxygen from the outside environment into the body. It also removes carbon dioxide and water from the body.

Respiration: What is it? oxygen + sugar Energy and carbon dioxide Respiration is the process by which oxygen and glucose (sugar) go through a chemical reaction inside cells. The chemical reaction releases energy that the cell uses.

Do Now: Describe what is happening in this picture. Use these terms: lungs, arteries, veins, blood cells, body cells, heart, oxygen and carbon dioxide. Roar ticket for best use of science vocabulary.

What is air we breathe made of? Air is made up of a mixture of gases. 21% oxygen 78% nitrogen 1 % carbon dioxide, helium and other gases. What is air mostly?

Breathing – it is not the same as respiration Breathing is moving air in and out of your lungs. atients.asp atients.asp one direction

Do Now: Sequence the pathway of air as it flows from outside the body to the alveoli As air travels from outside, it travels through the nose, pharynx, larynx, trachea and bronchi and bronchioles to the alveoli chool/phsciexp/active_art/res piratory_system/index.html (pharynx) Rk

The alveoli The alveoli are tiny air sacs in the lungs

Gas Exchange in the Lungs animation of gas exchange

Inside the Lungs

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