Lesson 3 Muscular System

3. The type of action whereby muscles move involuntarily.
4. Involuntary muscles that line the digestive tract to move food through the intestines.__muscle
6. The small strips of protein located inside each myofibril.
8. The muscle type that forms much of the heart.
9. Muscles that close the joints. ___ muscles
11. The type of cellular energy generation that occurs when there is inadequate supply of oxygen in that cell.
12. The muscles that are attached to and move your bones.
14. These connect skeletal muscle to bones.
15. The tissue that forms voluntary or skeletal muscle. 3 words
17. This is another name for the skeletal muscles, because you can control them without thinking about controlling them.__muscle
20. The tendon that attaches the calf muscle and heel bone. 2 words
22. A pair of muscles or muscle groups that act to pull a bone in opposite directions.

1. This is produced when muscles are partially contracted.
2. The muscle that connects to the back of the pelvic girdle and femur. 2 words
5. Strands of protein inside skeletal muscle cells.
7. Muscles that open the joints wider. ____ muscle
10. A cellular waste product created when energy is produced anaerobically. 2 words
13. A condition that occurs when a muscle is underused and therefore becomes weak and shrinks.
16. The muscle that closes the mouth and keeps it closed.
18. This condition occurs when tendons are overused and become inflamed.
19. The type of energy production that requires oxygen.
21. A sugar that the human body turns certain foods into. It can be used to make energy to power muscle cells.