Year 8
Breathing And The Lungs
1) Complete the diagram of the breathing system using the words below:
Diaphragm
Epiglottis
Lung
Bronchioles
Bronchi
Larynx (voice box)
Trachea (wind pipe)
Ribs
Intercostal Muscles
2) Complete the sentences below by choosing from the words in brackets:
When you breathe in:
Your diaphragm goes _________ (down/up).
Your _______________ (epiglottis/intercostal muscles) contract causing your ribs to
____________(expand/move inwards).
Your lungs get ________ (bigger/smaller).
When you breathe out:
Your diaphragm goes ____________ (down/up).
Your ________________ (epiglottis/intercostal muscles) relax and your ribs ____________
(expand/move inwards).
Your lungs get _________ (bigger/smaller).