KS3 Y8 Air Supply

Gap-fill exercise.

Name:_________________________Class:___________________Date:__________________

  
Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button if available to get a clue. Note that you will lose points if you ask for hints or clues!
   absorbin      air      alveoli      bigger      breathe      breathing      bronch      capillaries      carbon dioxide      cilia      ciliated epithelial cells      diffusion      dirt      excretion      exhale      gas exchange      goblet      inhale      large surface area      lots of them      mucus      Mucus      muscles      oxygen      red blood cells      redder      sacs      size      smaller      sticky      stop      sweep      tennis court      thick      thin      trachea      ventilation      very few of them   
During the process of our chest and the diaphragm changes the of our lungs. When we or in our muscles make the lungs get .

When we or out our muscles make our lungs get . The movement of in and out of our lungs is called .

Our lungs contain many thousands of air also called . These alveoli provides a for the g of and the of . The surface area of the lungs if flattened out would cover a .

These alveoli also have very walls which are only one cell . This allows of gases across them easily.

Diffusion is the process whereby particles move from a place where there are to a place where there are (until they are equally distributed everywhere).

So in the alveoli diffuses into the blood and diffuses out of the blood. The alveoli are also surrounded by many blood and they also have very thin walls to allow diffusion. In the blood oxygen is carried by the . When this happens blood looks .

The process of getting from air and getting rid of in the alveoli is called .

In our and i we have cells which releases . is a liquid which traps and germs. These goblet cells are found in tubes leading to the lungs.

In out trachea and bronchi are also found . These are cells with tiny hairs called . These cilia the mucus out of the lungs and into the gullet where it is swallowed. This way our lungs are kept clean.

If we smoke chemicals in cigarette smoke can the cilia working. Smokers therefore can get sick easily.

 

 

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