Muscular System In What muscles did you use

Muscular System In- �What muscles did you use the most yesterday/this week Out- �Summarize the role of muscles in the body.

Muscular System Voluntary Muscles Involuntary Muscles Muscle control �Muscles that you are able to control consciously- by thinking bout it (i. e. muscles in face, hands, arms, and legs) �Muscles that you are NOT able to control consciously (i. e. muscles that pump blood and move food through the digestive system)

Muscular System Levers First class. Second Class. Third class- Your body’s simple machines �Fulcrum lies between the effort force and the load (teeter totter) �The load lies between the fulcrum and the effort force (wheel barrel) �The effort force is between the fulcrum and the load (baseball)

Muscular system Type of Muscle Three types of muscle tissue Voluntary or Where Found Involutary in the Body Skeletal Muscle Voluntary Attached to bones throughout the body Cardiac Muscle Involuntary Heart Smooth Muscle Involuntary Intestines, bladder, blood vessels, and other internal organs.

Muscular System Muscles always pull-they never push! In- �Suppose a woman began riding her bike Out- �Using any TWO muscles (by name) from more regularly instead of watching T. V. Evaluate what kinds of changes in her leg muscles she might start seeing. Explain why this occurs. your handout-summarize how muscles work in pairs (using contracts & relaxes)

Muscular System How Muscles are Fueled �Blood carries ________ to your muscle cells. When your muscles contract, ______ from these molecules is converted to _____ and ______. When the supply of _________ in the muscle is _____, the muscle becomes ______. As the muscle _______, blood brings more _________ to your muscle cells.

Muscular System How Muscles are Fueled �Blood carries energy-rich molecules to your muscle cells. When your muscles contract, chemical energy from these molecules is converted to mechanical energy and thermal energy. When the supply of energy -rich molecules in the muscle is used up, the muscle becomes tired. As the muscle rests, blood brings more energy-rich molecules to your muscle cells.