Copyright © 2005 Pearson Education, Inc., publishing as Benjamin Cummings Muscle Tissues Muscle tissues Skeletal (striated) muscle Used to move skeleton.

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There are 3 types of muscle tissue:  skeletal  smooth  cardiac

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Copyright © 2005 Pearson Education, Inc., publishing as Benjamin Cummings Muscle Tissues Muscle tissues Skeletal (striated) muscle Used to move skeleton Cardiac muscle Intercalated discs Smooth muscle Found in hollow organs and blood vessel walls

Copyright © 2005 Pearson Education, Inc., publishing as Benjamin Cummings Skeletal Muscle Tissue Figure 4.14a

Skeletal Muscle

Smooth muscle cell Nucleus Smooth muscle APPERANCE: not striated, single nuclei LOCATIONS: Encircles blood vessels; found in walls of hollow organs (digestive tract, etc) FUNCTIONS: Involuntary movement of food, and secretions; control of vessel diameter

Copyright © 2005 Pearson Education, Inc., publishing as Benjamin Cummings Smooth Muscle Tissue Figure 4.14c

Smooth muscle

Smooth Muscle

Copyright © 2005 Pearson Education, Inc., publishing as Benjamin Cummings Cardiac Muscle Tissue Figure 4.14b

Nucleus Cardiac muscle cells Intercalated discs Striations Cardiac muscle APPERANCE: striated with branched cells, single nuclei, and intercalated discs LOCATIONS: walls of heart (myocardium) FUNCTIONS: involuntary beating of heart

Cardiac muscle, longitudinal section Cardiac Muscle

Intercalated discs

Neuromuscular junction axon Neuromuscular junction Motor neuron

NOTE: Each muscle fiber is innervated by only ONE neuron Neuromuscular junction

Skeletal Cardiac Smooth V. Muscle Tissue Neuromuscular junction