肌肉组织（PPT课件讲稿）Muscle Tissue

e Muscle Tissue Department of Histology and embryology Zhang jing

Muscle Tissue Department of Histology and Embryology , ZhangJing

General description (1)components Muscle cells: elongated thread-liked shape muscle fibers Cell membrane- Sarcolemma(肌膜) Cytoplasma- Sarcoplasm(肌浆) Smooth endoplasmic reticulum(sEr) Sarcoplasmic reticulum(肌浆网) Connective tissue, blood vessel, lymph-vessel and nerve

(1) components General description Muscle cells: elongated ,thread-liked shape----- muscle fibers Cell membrane - Sarcolemma(肌膜) Cytoplasma - Sarcoplasm (肌浆) Smooth endoplasmic reticulum(SER) - Sarcoplasmic reticulum(肌浆网) Connective tissue,blood vessel, lymph-vessel and nerve

Skeletal muscle

Skeletal muscle

(2)Classification According to the structure and function e skeletal muscle: striated, voluntary e cardiac muscle: striated. involuntary g/ smooth muscle: unstriated. involuntary

(2) Classification According to the structure and function skeletal muscle: striated, voluntary cardiac muscle: striated, involuntary smooth muscle: unstriated, involuntary

Classification of muscle tissue Skeletal m.T Cardiac M.T Smooth M.T

Classification of muscle tissue

1 Skeletal muscle

1. Skeletal muscle

1.1 The structure of skeletal muscle fiber under lm 骨感肌纤 毛细血管 骨胳肌纤维-m,纵断一x 骨胳肌纤 暗带 H爷 明带 骨骼肌纤维 Longitudinal section of skeletal muscle

1.1 The structure of skeletal muscle fiber under LM Longitudinal section of skeletal muscle

1.1 The structure of skeletal muscle fiber under lm Longitudinal section----- Shape of muscle fiber: Long cylindrical no branched Cross striations Nuclus: Multinucleated, oval, just beneath the sarcolemma(at its periphery) Sarcoplasm: filled with longitudinal parallel-arranged myofibrils(肌原纤维)

1.1 The structure of skeletal muscle fiber under LM Shape of muscle fiber: Long cylindrical, No branched, Cross striations. Longitudinal section------- Nuclus: Multinucleated, oval, just beneath the sarcolemma (at its periphery). Sarcoplasm: filled with longitudinal parallel-arranged myofibrils（肌原纤维）

束肌纤维 一条肌纤维 条肌原纤维 带 A带—1带一1A带—1{带 中, lH带 一个肌节M线 线 个肌节 Sarcomere: a segment of myofibril extending from one z line to next z line. which is composed of 1/2 i band, a band and 1/2 I band which is the smallest structural and functional unit of skeletal muscle fiber

* Sarcomere: a segment of myofibril extending from one Z line to next Z line, which is composed of 1/2 I band, A band and 1/2 I band ,which is the smallest structural and functional unit of skeletal muscle fiber

肌束 肌内膜 肌来膜 横断 Transverse section of skeletal muscle

Transverse section of skeletal muscle