The Muscular System.

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The Muscular System Chapter 7
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Presentation transcript:

The Muscular System

Gross Anatomy of Skeletal Muscle bundle of muscle fibers muscle fiber (cell) myofibril sarcomere

Connective Tissue Sheaths Endomysium Perimysium Epimysium Collagen fibers of all 3 layers come together at each end of muscle to form a tendon or aponeurosis.

Basic Features Nerve & blood supply Attachments Origin Insertion

Muscle Fiber Anatomy Sarcolemma Sarcoplasm Myoglobin Transverse tubules (T-tubules) Myofibrils Myofilaments Two types Actin filaments (thin filaments) Myosin filaments (thick filaments)

Myofibril

A band Sarcomere

Sarcomere I bands

Z lines Sarcomere

Actin and Myosin Filaments

Myosin (Thick) Filament

Actin (Thin) Filament

axon myofibrils sarcomere plasma membrane

T tubules sarcoplasmic reticulum

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