Changes

The '''rib cage''' is the [[bone]]s in our [[thorax]] which serve to protect the [[lungs]] and [[heart]].

: The '''rib cage''' is part of the [[Breathing System|breathing system]].: As [[air]] is [[inhale]]d the '''rib cage''' expands due to [[Intercostal Muscle|intercostal muscles]] contracting and lifting and pulling the [[rib]]s up and outwards.: As [[air]] is [[exhale]]d the '''rib cage''' moves inward due to [[Intercostal Muscle|intercostal muscles]] relaxing. ==Key Stage 4==[[File:RibCage.png|right|300px|thumb|A clipart image of the '''rib cage'''.]]===Meaning===The '''rib cage''' is the [[bone]]s in our [[thorax]] which protect the [[lungs]] and [[heart]] as well as expand and contract to allow [[breathing]].===About the Rib Cage===: The '''rib cage''' is part of the [[Breathing System|breathing system]].: As [[air]] is [[inhale]]d the '''rib cage''' expands due to [[Intercostal Muscle|intercostal muscles]] contracting and lifting and pulling the [[rib]]s up and outwards.: As [[air]] is [[exhale]]d the '''rib cage''' pulls moves inward due to [[Intercostal Muscle|intercostal muscles]] contractingrelaxing. ===References=======AQA==== :[https://www.amazon.co.uk/gp/product/0008158754/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158754&linkCode=as2&tag=nrjc-21&linkId=27ad53b0283feeff7fc5ae04a9e205f491 ''Rib, page 118, GCSE Biology; Student Book, Collins, AQA '']