Skeletal Muscle
(eg:Muscles of limb & trunk)
[Each muscle fibre(cell) is long and cylindrical without branching.
They are multinucleated with peripheral nuclei.
Has Dark and Light transverse striations.]
>Covering of skeletal muscles
*epimyseum - covers entire muscle
*perimyseum - covers muscle bundle
*endomyseum - covers each fibre
*sacrolemma - cell membrane
>Bands:-
The light and dark band(striations)are due to the presence of "A" and "I" bands in myofibrils.Myofibrils are longitudinally running fibrils in the sacroplasm of skeletal muscle fibres(cells).
: A- band is known as light band,whereas
I- band is known as dark band.The I band is bisected by a dark line called Z-line ,& the segment between two Z lines is called a 'sarcomere',it is the contracting unit of the muscle.
[Each muscle fibre(cell) is long and cylindrical without branching.
They are multinucleated with peripheral nuclei.
Has Dark and Light transverse striations.]
>Covering of skeletal muscles
*epimyseum - covers entire muscle
*perimyseum - covers muscle bundle
*endomyseum - covers each fibre
*sacrolemma - cell membrane
>Bands:-
The light and dark band(striations)are due to the presence of "A" and "I" bands in myofibrils.Myofibrils are longitudinally running fibrils in the sacroplasm of skeletal muscle fibres(cells).
: A- band is known as light band,whereas
I- band is known as dark band.The I band is bisected by a dark line called Z-line ,& the segment between two Z lines is called a 'sarcomere',it is the contracting unit of the muscle.
How to draw
