BIO1022 Lecture Notes - Lecture 7: Axial Skeleton, Appendicular Skeleton, Phosphocreatine
30 May 2018
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BIO1022 – Week 4 – Lecture 7 – Musculoskeletal System
- why have muscles?
• movement
• balance
• posture
• feeding
• sensory function
• sound
• visual communication
• digestion
• peristalsis
• birthing
• thermogenesis
•
o generation of heat
• generation of heat and electricity
• internal organ function
- four major functional characteristics
• contractility
• excitability
• extensibility
• elasticity
- invertebrate muscle tissues
• smooth
• striated
• fibrillar
- vertebrate muscle tissues
• skeletal - striated
•
o located around skeletal system
o striated - stripey
o movement and posture
o control - voluntary
o contractes, relaxes and tires quickly
• cardiac
•
o heart
o highly modified form of striated muscle
o pumping of hear
o involuntary control
o contracts as unit, self exciting, rhythmic
• smooth
•
o digestive system
o womb
o slow powerful contractions
o walls of hollow viscera
o movement, peristalsis - movement of an object through a tube
o involuntary
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