肌肉组织 The Muscle Tissue Skeletal muscle (No.9)(Drawing)

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Presentation transcript:

肌肉组织 The Muscle Tissue Skeletal muscle (No.9)(Drawing) Cardiac muscle (NO.10) Smooth muscle (NO. 1) 20140319

Skeletal muscle Connective tissue coverings (responsible for force transduction): Epimysium: surround the entire muscle Perimysium: surround a muscle bundle Endomysium: surround individual muscle cells

Skeletal muscle: HE X100

Skeletal muscle: HE X100

Skeletal muscle:HEX400 Perimysium Endomysium Muscle fiber Peripherally situated nuclei myofibrils Skeletal muscle:HEX400

Skeletal muscle: HEX400 Long cylindrical cell Multinucleate Dark bands-A Light bands-I Skeletal muscle: HEX400

Cardiac muscle Endocardium Myocardium Epicardium

endocardium Purkinge fibers myocardium

Cardiac muscle:HEX100 Intercalated discs Cross striation Elongated and centrally situated nuclei Cardiac muscle:HEX100

Cardiac muscle:HEX400

Cardiac muscle:HEX400 (cross section) Cap Cardiac muscle:HEX400 (cross section)

Smooth muscle Adventitia Muscular layer Submucosa Mucosa Small intestine: HEX40

Smooth muscle:HEX400 Elongated spindle-shaped cell Centrally situated nucleus No cross striation Smooth muscle:HEX400

A few cells with nuclei CT betw. fibers Smooth muscle:HEX100

Skeletal Muscle (Drawing) 1.Cross Section: Epimysium Perimysium Endomysium 2. Longitudinal Section: I,A band, sarcomere

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