Respiratory SystemNotes pg 69

Respiratory System• You breathe in O2 and breathe out CO2

• Glue the diagram into pg 68 and label:Nose & mouthEpiglottisLungTracheaBronchiAlveoliDiaphragmUse pg 972 to help you

Some important parts

• Epiglottis – covers your trachea when you swallow

• Diaphragm – muscle that controls breathing. Contracts to pull air in.

• Alveoli – Puts O2 into the blood stream and takes CO2 out.

• Draw this pic in your notes:

• The throat, trachea, and bronchi are lines with cilia (tiny hairs) that remove dust, pollution, and other particles that we breathe in.

• Too much pollution or smoke damages the cilia so they can’t clean out the lungs.

• Too much pollution or smoke damages the cilia so they can’t clean out the lungs.