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Muscular System

Learn about the three types of muscle tissue, parts of a skeletal muscle, coverings of a skeletal muscle, neuromuscular junction, arrangement of muscle fibers, and naming of skeletal muscles.

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Muscular System

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  1. Muscular System By Dr ShivaramaBhat

  2. OBJECTIVES • To know about 3 types of muscle tissue. • Parts of a skeletal muscle. • Coverings of a skeletal muscle. • Neuromuscular junction. • Arrangement of muscle fibres. • Naming of skeletal muscles.

  3. MUSCLES • Make up 40% body weight. • About 600 individual muscles are present attached to bones. • Present in cardia. • Present in viscera, tubes.

  4. Introduction: Muscles are organs that use chemical energy to contract and produce movements of body or its parts. The three types of muscle in the body are: skeletal smooth cardiac muscle

  5. 3 Types of Muscle Tissue

  6. Smooth Muscle Fibers • elongated cells with tapered ends (spindle shaped) • One nucleus per cell • involuntary • lack striations and transverse tubules • undeveloped sarcoplasmic reticulum • Found in walls of hollow organs

  7. branching, striated cells • One nucleus per cell • Striated • Connected by intercalated discs • Transmits muscle impulse from cell to cell Cardiac Muscle

  8. Skeletal Muscle • Long, multinucleate cylinders • Striated • Voluntary

  9. Parts of a skeletal muscle.

  10. ATTACHMENTS • ORIGIN • INSERTION

  11. PARTS • BELLY. • TENDON, APONEUROSIS.

  12. Parts of a Skeletal Muscle

  13. TENDON & APONEUROSIS

  14. RAPHAE

  15. Sharpey’sFibres

  16. Structure of a Skeletal Muscle Each muscle is an organ made of several tissues: 1. skeletal muscle tissue 2. connective tissues 3. nervous tissue 4. blood vessels/blood

  17. Connective tissue coverings/muscle organization 1. Fascia 2. Epimysium 3. Periamysium 4. Endomysium 5. Muscle fiber 6. Myofibrils 7. Filaments

  18. Fascia Epimysium Perimysium MuscleFiber Endomysium

  19. NEUROMUSCULAR JUNCTION

  20. Skeletal Muscle Actions • Muscles are connected to bones at origins and insertions • Origins are ends that do not involve movement • insertions usually span a joint that moves

  21. Interaction of Skeletal Muscles Prime mover is the muscle responsible for the movement Synergists are helper muscles Antagonistsare opposing muscles

  22. RETINACULA

  23. LIGAMENTS, FASCIA

  24. TROCHLEA

  25. BURSA

  26.  Major Skeletal Muscles Muscles are named according to any of the following criteria: size, shape, location, action, number of attachments, or direction of its fibers.

  27. Types of skeletal muscles.

  28. QUESTIONS • Name different types of arrangement of skeletal muscle fibres. • Enumerate the differences and similarities of 3 types of muscle tissues.

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