© 2012 Pearson Education, Inc. Muscle Tissue Function is to produce movement Three types Skeletal muscle Cardiac muscle Smooth muscle.

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Presentation transcript:

© 2012 Pearson Education, Inc. Muscle Tissue Function is to produce movement Three types Skeletal muscle Cardiac muscle Smooth muscle

© 2012 Pearson Education, Inc. Muscle Tissue Types Skeletal muscle Under voluntary control Contracts to pull on bones or skin Produces gross body movements or facial expressions Characteristics of skeletal muscle cells Striated Multinucleate (more than one nucleus) Long, cylindrical cells

© 2012 Pearson Education, Inc. Figure 3.20a Nuclei Part of muscle fiber (a) Diagram: Skeletal musclePhotomicrograph: Skeletal muscle (approx. 300×).

© 2012 Pearson Education, Inc. Muscle Tissue Types Cardiac muscle Under involuntary control Found only in the heart Function is to pump blood Characteristics of cardiac muscle cells Striated One nucleus per cell Cells are attached to other cardiac muscle cells at intercalated disks

© 2012 Pearson Education, Inc. Figure 3.20b Intercalated discs Nucleus (b) Diagram: Cardiac musclePhotomicrograph: Cardiac muscle (430×).

© 2012 Pearson Education, Inc. Muscle Tissue Types Smooth muscle Under involuntary muscle Found in walls of hollow organs such as stomach, uterus, and blood vessels Characteristics of smooth muscle cells No visible striations One nucleus per cell Spindle-shaped cells

© 2012 Pearson Education, Inc. Figure 3.20c Smooth muscle cell Nuclei (c) Diagram: Smooth musclePhotomicrograph: Sheet of smooth muscle (approx. 300×).

© 2012 Pearson Education, Inc. Brain, spinal cord, and nerves Nervous tissue: Internal communication Muscle tissue: Contracts to cause movement Muscles attached to bones (skeletal) Muscles of heart (cardiac) Muscles of walls of hollow organs (smooth) Epithelial tissue: Forms boundaries between different environments, protects, secretes, absorbs, filters Lining of GI tract organs and other hollow organs Skin surface (epidermis) Connective tissue: Supports, protects, binds other tissues together Bones Tendons Fat and other soft padding tissue Figure 3.22