CIE IGCSE Biology: 复习笔记:11.1.6 Identifying Intercostal Muscles: Extended

CIE IGCSE Biology: 复习笔记:11.1.6 Identifying Intercostal Muscles: Extended

Identifying Intercostal Muscles: Extended

  • Muscles are only able to pull on bones, not push on them
  • This means that there must be two sets of intercostal muscles; one to pull the rib cage up and another set to pull it down
  • One set of intercostal muscles is found on the outside of the ribcage (the external intercostal muscles)
  • The other set is found on the inside of the rib cage (the internal intercostal muscles)

The-lungs

There are 2 sets of intercostal muscles: the external, on the outside of the rib cage, and the internal, on the inside of the rib cage

转载自savemyexams

 

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