Muscles and Their Actions
11th Grade · Science · 30 min
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Learning Objective
I can identify the major muscles of the human body and describe their primary functions.
- 1
Muscles can only contract and pull, so complex motion requires many muscles working together.
- 2
The four functional classifications of muscles are prime movers, antagonists, synergists, and fixators.
- 3
Skeletal muscles are named according to criteria such as muscle location, shape, size, and the direction of muscle fibers.
