1. Chapter 9 Includes Crash Course Videos part 1 and 2
Muscle Overview
Chapter 9
Includes Crash Course Videos part 1 and 2

2. Overview Of Muscle Tissues
This contains many of the same images as in the text.

3. Crash Course Muscle Part 1
Basic muscle structure, sarcomere contraction, action potential etc.
Crash Course Muscle Part 2
Some information from chapter 10, but then:
Muscle Units, Muscle twitch, Muscle response to frequency of signals, Muscle response to strength of signal,
Isotonic vs isometric exercises