《肌肉系统解剖》PPT课件

sections (longitudinal, oblique and cross section) of skeletal muscle fibers. 低倍镜10*：纵、斜、横切面
Skeletal muscle fibers (longitudinal section, lower magnification)
Skeletal muscle fibers (lower magnification)
Cross section Longitudinal section Blood vessel (oblique section)
Lower power objective lens 10×:Move slide to find various
muscle fiber the myofibrils are stippled (dot) appearance. The delicate LCT surrounding each skeletal muscle fiber can be seen, which is termed endomysium. 40*横切面：肌原纤维呈细点状结 构，周围包绕的细致疏松结缔组织为肌内膜。
Muscle Tissue 肌组织
Ying Ding Email:dingying@mail.sysu.edu.cn
The content
VCD: The function of skeletal muscle Observation: (1) Skeletal muscle 骨骼肌 HE, NO.21 special stain shown LCT in yellow color 荧光桃红 NO.22 (2) Cardiac muscle 心肌 HE, NO.19 special stain shown intercalated disc 铁苏木素染色看闰盘 NO.20 (3) Smooth muscle 平滑肌 HE, NO.23 Homework: Draw the longitudinal and cross section of skeletal muscle fiber in high power objective lens 40×, and describe its construction features. 作业：在高倍镜下描绘骨骼肌纤维的纵、横切面，并 描述其结构特征。
(skeletal muscle fibers)
loose connective tissue
Lower power objective lens 10×: This is longitudinal section of
skeletal muscle fibers. Compare the staining of muscle tissue with LCT. What are their differences? 低倍镜10*：骨骼肌的纵切面。 试比较其与疏松结缔组织的不同。
(the nucleus of skeletal muscle fiber)
(skeletal muscle fiber)
高倍镜40*：分析不同切 面的骨骼肌特征。
loose connective tissue
a skeletal muscle fiber(cross section)
High power objective lens 40×: Analyses the structure
(loose connective tissue)
High power objective lens 40×: In the longitudinal of skeletal
muscle fiber the myofibrils are very thin parallel with the length of the cell. And identify its cross alternative light and dark band (cross stria) with the diaphragm closed down. 40*镜纵切面：与 长轴平行的细丝为肌原纤维。缩小光圈区分明暗相间的横纹-明暗带。
a skeletal muscle fiber (cross section)
myofibrils (cross section) myofibrils (longitudinal section)
High power objective lens 40×: In the cross section of skeletal


肌组织的分类、分布：
骨骼肌 心
心
分类
肌
脏
平滑肌
内脏、血管壁
分布 躯干、四肢
光镜
收缩பைடு நூலகம்
横纹肌
随意肌 快 不持久
横纹肌
不随意肌 有节律 持久
无横纹
不随意肌 慢 持久
(1)Skeletal muscle 骨骼肌 HE NO.21


Naked eye: The section of tongue is pink color. 肉眼：舌头切面，染成粉红色 Lowest power objective lens 4×: The most tissue is stained in pink. 低倍镜4*：表面凹凸不平，深蓝色的为舌黏 膜上皮，深面为骨骼肌，大部分染成粉红 色。
myofibrils(cross section)
myofibrils(longitudinal section)
多核，位于肌纤维的周边， 紧靠肌膜内面，不同切面均 可见。
(the nucleus of skeletal muscle fiber)
(skeletal muscle fiber)
cross stria
in different sections of individual skeletal muscle fiber. Multi nuclei are peripheral location just underneath of the sarcolemma, which can be seen in various sections.