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Muscular System Slide 2 Functions of Muscle Tissue Produce Movement Slide 3 Functions of Muscle Tissue Maintains Posture & Body Position Slide 4 Functions of Muscle Tissue Supports Soft Tissues Slide 5 Functions of Muscle Tissue Guards Entrances and Exits Swallowing Urinating Defecating Slide 6 Functions of Muscle Tissue Maintains Body Temperature Slide 7 3 Types of Muscle Tissue SkeletalSmoothCardiac Slide 8 Skeletal Muscle:Structure Slide 9 Skeletal Muscle: Function Voluntary movement and locomotion Facial expressions Slide 10 Skeletal Muscle: Location Slide 11 Cardiac Muscle: Structure Slide 12 Cardiac Muscle: Function Slide 13 Cardiac Muscle Location Slide 14 Smooth Muscle: Structure Slide 15 Slide 16 Cross-section of intestines showing longitudinal and circular layers Figure 10.12b Slide 17 Smooth Muscle Function Slide 18 Smooth Muscle: Location Slide 19 Structure of a Skeletal Muscle Muscle Muscle Fascicles Muscle Fibers (Cells) Slide 20 Structure of a Skeletal Muscle Fiber (Cell) Myofibrils Slide 21 Structure of a Sarcomere Sarcomeres: Thick and Thin Filaments Slide 22 Structure of a Skeletal Muscle Fiber (Cell) Figure 10.4b Slide 23 Structure of a Skeletal Muscle Fiber (Cell) Figure 10.8 Slide 24 Summary of Structure of Skeletal Muscles Muscle Fasicles Muscle Fiber (Cell) Myofibril Sarcomere Myofilaments Slide 25 Neuromuscular Junctions Figure 10.4d Slide 26 Neuromuscular Junctions Figure 10.4d Slide 27 Neuromuscular Junctions Figure 10.4d Slide 28 Contraction of a Skeletal Muscle (Sliding Filament Theory) Figure 10.6a Slide 29 Contraction of a Skeletal Muscle (Sliding Filament Theory) Slide 30 Summary of Sliding Filament Mechanism Figure 10.6a Slide 31 Muscle Attachments Most skeletal muscles run from one bone to another. Most muscles are attached to bones by tendons or aponeuroses Slide 32 Muscle Attachments Origin = Point of attachment of a muscle that is least movable Insertion = point of attachment of a muscle that is most movable Slide 33 Muscle Attachments: Connective Tissues Tendons Aponeuroses Slide 34 Interactions of Skeletal Muscles in the Body Muscles can exert a pull but not a push. Thus, muscles are typically arranged in pairs: one pulls a bone in one direction and the other pulls it in the opposite direction. Slide 35 Interactions of Skeletal Muscles Prime mover (agonist) has major responsibility for a certain movement Antagonist opposes or reverses a movement Synergist helps the prime mover