1. Skeleton and muscles

2. Learning objectives
Recognize that the skeletal system is dynamic especially when we are young.
Bones are a store for calcium and calcium can be added or withdrawn depending on needs
Distinguish between the axial and appendicular parts of the skeleton
Recognize the bones of the chest, legs, and arms
Recognize different types of muscle and how their functions differ.
Understand how muscles work with the skeletal system to produce movement.

21. Types of skeletal muscle
“Slow” fibers
Sustain long, repeated contractions
Many mitochondria
“Fast” fibers
Quick bursts of power
Few mitochondria