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Human Bio 11 The Muscular System: Interesting Facts.

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Presentation on theme: "Human Bio 11 The Muscular System: Interesting Facts."— Presentation transcript:

1 Human Bio 11 The Muscular System: Interesting Facts

2 Interesting Facts You have more than 650 muscles. Muscles make up 40% of your body mass.

3 Interesting Facts Muscles contract (shorten). They pull on bones, producing movement. You are constantly moving. Even when you are sleeping. Muscle cells cannot partially contract. They either contract 100% or do not contract at all.

4 Interesting Facts Shivering: When you are cold, your muscles produce rapid contractions to generate body heat. Cramp: A painful muscle contraction.

5 Interesting Facts Spasm: A rapid involuntary contraction of a muscle. Example: an eye twitch Tetanus: A persistent, severe contraction that can be caused by a bacterial infection. A tetanus shot can help prevent this. Example: tetanus can cause lock jaw.


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