MUSCLE TISSUE. skeletalsmoothcardiac Additional common names Striated voluntary m. Visceral muscle m. Non-striated involuntary m. Striated involuntary.

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Presentation transcript:

MUSCLE TISSUE

skeletalsmoothcardiac Additional common names Striated voluntary m. Visceral muscle m. Non-striated involuntary m. Striated involuntary m. Shape of CellLong, threadlike, cylindrical Long narrow, spindle shaped, tapered ends Quadrangular in shape, elongated location of nucleus Multinucleated per cell One nucleus per fiber Single nucleus per fiber presence of striations Yes (numerous) No yes location in the body Muscles attached to bone (locomotion, mastication and phonation) Walls of vicera (hollow internal organs – stomach, intestines, blood vessels Walls of the heart voluntary/involuntary voluntary (quick) Involuntary (slow and long lasting)Involuntary (vigorous and rhythmic) Other unique characteristics Many cells are called muscle fibers, Smooth in appearance, irregularly arranged fibres Branched fibres Unique dark bands called intercalated disks Appear as incomplete cells Controlled by autonomic NS Numerous mitochondria

Skeletal Muscle as seen in longitudinal section in the light microscope...

SKELETAL Muscle Tissue

Sliding Filament Theory

What type of tissue? Why?

Cardiac Muscle (longitudinal section) Central nuclei Striated, branched fibers joined by intercalated disks (arrows) forms interwoven meshwork

Cardiac Muscle (longitudinal section)

Intercalated Discs Couple Heart Muscle Mechanically and Electrically

Smooth Muscle

 m in diameter Up to 30cm in length  m in diameter  m in length  m in diameter  m in length

Skeletal Muscle Cardiac Muscle Smooth Muscle