Muscular System
All I ever do is contract!
Types of Muscle
! Skeletal
! Cardiac
! Smooth
Functions
! Movement
! Stability and posture
! Communication
! Sphincter Control
! Thermoregulation
! Cardiovascular pump
Characteristics of M.T.
! Mostly cells
! Relatively little
matrix
! Directly
vascularized
! Directly innervated
Properties of M.T.
! Excitability
(Irritability)
! Contractility
! Extensibility
! Elasticity
Properties of Skeletal Muscle
! Typically
Voluntary
! Striated
! Fiber Types
" Fast-Twitch
" Slow Twitch
Anatomy – Gross to Micro
The Big Picture
Shapes of Whole Muscle
Anatomy – Gross to Micro
! Muscle
! Fasciculi
! Muscle Fiber
! Myofibril
! Sarcomere
! Myosin and Actin
myofilaments
C.T. in Skeletal Muscle
! The 3 Mysium
brothers:
" Epimysium
" Perimysium
" Endomysium
Microscopic View
Skeletal Muscle Cell
Myofilaments