Muscle TissueHongya SunYangzhou University
1 Muscle Tissue Hongya Sun Yangzhou University
muscletissueOBJECTIVESMaster the microstructure and function ofthree kinds of muscle tissues.Master the ultra-structure and differentpoints between skeletal muscle andcardiacmuscle.Knowtheultra-structureof the smoothmuscle.Understand themolecular structureandcontraction mechanism ofskeletalmuscle
2 OBJECTIVES Master the microstructure and function of three kinds of muscle tissues. Master the ultra-structure and different points between skeletal muscle and cardiac muscle. Know the ultra-structure of the smooth muscle. Understand the molecular structure and contraction mechanism of skeletal muscle. muscle tissue
muscletissueI.IntroductionA. Composition:★ only muscle cells (muscle fibers)+ connective tissue1.musclefibers--myofiberselongatedandthread-likedshapespecificterminology in respectof muscle cell·musclecell--musclefiber.membrane-sarcolemmasynonymous·cytoplasm--sarcoplasmsmoothendoplasmicreticulum(sER)--sarcoplasmicreticulum2.connective tissue*providessupportofmusclefibersbringinbloodvessels,lymphaticsandnerves
3 A. Composition: ★ only muscle cells (muscle fibers) + connective tissue 1. muscle fibers-myofibers v elongated and thread-liked shape v specific terminology in respect of muscle cell muscle cell - muscle fiber membrane – sarcolemma cytoplasm - sarcoplasm smooth endoplasmic reticulum (SER)-sarcoplasmic reticulum 2. connective tissue v provides support of muscle fibers v bring in blood vessels, lymphatics and nerves. Ⅰ. Introduction muscle tissue synonymous
muscletissueB.ClassificationAccording to structural and functional featuresskeletal muscle: striated, voluntarycardiac muscle: striated, involuntarysmooth muscle: unstriated, involuntary
4 B. Classification According to structural and functional features v skeletal muscle: striated, voluntary v cardiac muscle: striated, involuntary v smooth muscle: unstriated, involuntary muscle tissue
II - Skeletal muscle
5 Ⅱ. Skeletal muscle