Chapter 10
muscle Tissue
The muscular System
includes Skeletal muscle and smooth and cardiac muscle.
700 named Skeletal muscles
Skeletal muscle
external movements of the human body
Smooth and cardiac muscle
internal movement of materials within and throughout body
Muscle tissue
/ cells)
⑪
bundles of muscle fibers
Specific characteristics
&
excitability
reacts to various stimuli
change in electrical charge across plasma membrane
signal internal events that lead to muscle contraction
Contractility shortens in length
*
& elasticity
recoils back to resting length
*
extensibility
extend in length muscle contraction
- as
opposing
Each skeletal muscle anatomic characteristics
organ
all four primary tissue types
Microscopic features
*
stricted
*
elongated
*
peripherally located nuclei
*
long cells
length of the muscle
attaches to one or more bones
Spans joints
huge variety of shape
, Levels of muscle
organization
Level Appearance Description Connective Tissue
·
Multiple fascicles housing many
covering
muscle muscle fibers , connective tieve
Epimysium
blood vessels , nerve fibers.
covering ,
*
Fascicle A bundle of muscle fibers Perimysium
*
Muscle Fiber Elongated ,
multinucleated , Endomysium
Imuscle cell) Cylindrical Fiber (cell) ; exhibits
strictions ; contains myofibrils
*
Myofibril Long ,
cylindrical contractile element
within muscle fiber ; ar
long as the muscle none
fiber itself ; composed of myofilament ;
exhibits strictions
·
Myofilaments Short contractile proteins of two
types : thick (composed of myosint and None
thin (composed of actin , tropomyosin and,
troponin)
muscle Tissue
The muscular System
includes Skeletal muscle and smooth and cardiac muscle.
700 named Skeletal muscles
Skeletal muscle
external movements of the human body
Smooth and cardiac muscle
internal movement of materials within and throughout body
Muscle tissue
/ cells)
⑪
bundles of muscle fibers
Specific characteristics
&
excitability
reacts to various stimuli
change in electrical charge across plasma membrane
signal internal events that lead to muscle contraction
Contractility shortens in length
*
& elasticity
recoils back to resting length
*
extensibility
extend in length muscle contraction
- as
opposing
Each skeletal muscle anatomic characteristics
organ
all four primary tissue types
Microscopic features
*
stricted
*
elongated
*
peripherally located nuclei
*
long cells
length of the muscle
attaches to one or more bones
Spans joints
huge variety of shape
, Levels of muscle
organization
Level Appearance Description Connective Tissue
·
Multiple fascicles housing many
covering
muscle muscle fibers , connective tieve
Epimysium
blood vessels , nerve fibers.
covering ,
*
Fascicle A bundle of muscle fibers Perimysium
*
Muscle Fiber Elongated ,
multinucleated , Endomysium
Imuscle cell) Cylindrical Fiber (cell) ; exhibits
strictions ; contains myofibrils
*
Myofibril Long ,
cylindrical contractile element
within muscle fiber ; ar
long as the muscle none
fiber itself ; composed of myofilament ;
exhibits strictions
·
Myofilaments Short contractile proteins of two
types : thick (composed of myosint and None
thin (composed of actin , tropomyosin and,
troponin)
