肌肉组织 the muscle tissue 1.skeletal muscle (no.9)(drawing) 2.cardiac muscle (no.10) 3.smooth...

肌肉组织

The Muscle Tissue

1.Skeletal muscle (No.9)(Drawing)

2.Cardiac muscle (NO.10)

3.Smooth muscle (NO. 1)

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Connective tissue coverings (responsible for force transduction):

Epimysium:surround the entire muscle

Perimysium: surround a muscle bundle

Endomysium: surround individual muscle cells

Skeletal muscle

Skeletal muscle: HE X100

Skeletal muscle: HE X100

Skeletal muscle:HEX400

Perimysium

Endomysium

Muscle fiber

Peripherally situated nuclei

myofibrils

Skeletal muscle: HEX400

Long cylindrical cell

Multinucleate

Dark bands-A

Light bands-I

Cardiac muscle

Endocardium

Myocardium

Epicardium

Purkinge fibersendocardium

myocardium

Cardiac muscle:HEX100

Intercalated discs

Cross striation

Elongated and centrally situated nuclei

Cardiac muscle:HEX400

Cardiac muscle:HEX400 (cross section)

Cap

Smooth muscle

Small intestine: HEX40

Adventitia

Muscular layer

Submucosa

Mucosa

Smooth muscle:HEX400

Elongated spindle-shaped cell

Centrally situated nucleus

No cross striation

Smooth muscle:HEX100

A few cells with nuclei

CT betw. fibers

Skeletal Muscle (Drawing)

1.Cross Section:

Epimysium

Perimysium

Endomysium

2. Longitudinal Section:

I,A band, sarcomere

The end