Muscular System - muscles, functions & muscle contractions
- Created by: mellis98
- Created on: 30-10-13 13:27
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- Muscular System
- MUSCLES
- CARDIAC
- INVOLUNTARY MUSCLE - found in heart - contracts & relaxes continuously
- SMOOTH
- INVOLUNTARY MUSCLE - around organs (intestines) - provide nutrients
- SKELETAL
- VOLUNTARY MUSCLE - attached to skeleton by tendons
- CARDIAC
- FUNCTIONS
- MOVEMENT
- muscles contract causes tendons to pull on bone to move
- SHAPE
- more defined better body shape
- PROTECTION
- protect & keep abdominal organs in place
- CIRCULATION
- muscles need to squueeze veisnto get blood back to heart
- POSTURE
- good muscle tone - bones in correct position
- GENERATE BODY HEAT
- when muscles contract & relax produce heat energy
- MOVEMENT
- MUSCLE CONTRACTIONS
- ISOMETRIC
- force produced with no movement e.g. tug of war/rugby scrum
- ISOTONIC
- force produced with movement
- CONCENTRIC - muscle shortens under tension
- ECCENTRIC - muscle lengthens under tension
- ISOMETRIC
- MUSCLES
- INVOLUNTARY MUSCLE - around organs (intestines) - provide nutrients
- more defined better body shape
- ECCENTRIC - muscle lengthens under tension
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