7th Grade Chapter 17 Study Guide - TeacherPage - How to muscles work in pairs

Describe how muscles work in pairs. 42. What is the purpose of the ribs and skull? 43. How does the skin act as a sensory organ? 44. Why are the muscles that move food through your digestive track called involuntary muscles? 45. Why must a skin graft be taken from the victim's own body? ................
................

In order to avoid copyright disputes, this page is only a partial summary.