muscular system. terminology (pg. 167) myo-fasciculus sarco-platys iso-tonos syn--trophy...
TRANSCRIPT
Muscular Muscular SystemSystem
Terminology (pg. 167)Terminology (pg. 167)
myo- fasciculus
sarco- platys
iso- tonos
syn- -trophy
tetanos caput
IntroductionIntroduction• Over 600 muscles
• Lots of mitochondria and blood vessels
• 45% of body weight is muscles
FunctionsFunctions1. Locomotion: move skeleton
2. Posture: some muscles are always partially contracted
3. Maintain body temperature by producing heat
4.Respiration and circulation
5. Guarding entrances
and exits (sphincters)
• 6.Movement along internal passageways (peristalsis)
7.Communication (verbal and body language)
CharacteristicsCharacteristics
• 1. Excitability-ability to respond
2.Contractibility-ability to shorten
• 3.Extensibility-ability to stretch
• 4.Elasticity-ability to return to previous length
Types-SkeletalTypes-Skeletal
striated-appear lined
voluntary
lots of nuclei in the cell
SmoothSmooth
• Non-striated
• Involuntary
• Spindle shaped
CardiacCardiac
• Striated
• Involuntary
• Branched intercolated disks