1. Michael D. Haight, D.C. © Michael D. Haight, D.C.

2. Why do we have muscle tissue? Muscular tissue enables the body and its parts to move Movement caused by ability of muscle cells (called fibers) to shorten or contract Three types of muscle tissue exist in body © Michael D. Haight, D.C.

3. 3 Types of muscle Skeletal Cardiac Smooth © Michael D. Haight, D.C.

4. Types of muscle tissue Skeletal muscle — also called striated or voluntary muscle © Michael D. Haight, D.C.

5. Muscle Tissue Function — all muscle cells specialize in contraction (shortening) Let ’ s find out how it does that! © Michael D. Haight, D.C.

6. Parts of a Skeletal muscle Origin — attachment to the bone that remains relatively stationary or fixed when movement at the joint occurs Insertion — point of attachment to the bone that moves when a muscle contracts Body — main part of the muscle © Michael D. Haight, D.C.

8. http://highered.mcgraw- hill.com/sites/0072495855/student_view0/chapter10/animation __sarcomere_contraction.html

9. Functions of skeletal muscle? Please list them….. © Michael D. Haight, D.C.

10. Functions of muscle? Movement Posture Heat production Let’s discuss how… © Michael D. Haight, D.C.

11. Movement How does this protect us? © Michael D. Haight, D.C.

12. Movement © Michael D. Haight, D.C.

13. http://www.wisc- online.com/objects/ap12004/ap12004.swf © Michael D. Haight, D.C.

14. Posture Posture or muscle tone © Michael D. Haight, D.C.

15. Poor Posture © Michael D. Haight, D.C.

16. Heat Production http://videos.howstuffwo rks.com/hsw/11965- heat-how-the-human- body-regulates-its- temperature-video.htm © Michael D. Haight, D.C.

17. Muscle Fatigue – what causes it? Reduced strength of muscle contraction Caused by repeated muscle stimulation without adequate periods of rest Repeated muscular contraction depletes cellular ATP stores Contraction in the absence of adequate oxygen produces lactic acid Oxygen debt - © Michael D. Haight, D.C.

18. http://dsc.discovery.com/videos/human-body-strength-street- gymnast.html

19. Role of Other Body Systems in Movement Muscle functioning depends on the functioning of many other parts of the body Respiratory, circulatory, nervous, muscular, and skeletal systems play essential roles in producing normal movements © Michael D. Haight, D.C.

20. Effects of Exercise on Skeletal Muscles © Michael D. Haight, D.C.

25. Muscle disorders Strain—injury from overexertion or trauma Cramps are painful muscle spasms (involuntary twitches) Infections Muscular dystrophy Myasthenia gravis © Michael D. Haight, D.C.

26. Time for Q and A! Do you have any questions? © Michael D. Haight, D.C.