1. 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

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

3. Skeletal Muscle

5. 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

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

7. Smooth muscle

8. Smooth Muscle

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

11. 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

12. Cardiac muscle, longitudinal section Cardiac Muscle

13. Intercalated discs

14. Neuromuscular junction axon Neuromuscular junction Motor neuron

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

16. Skeletal Cardiac Smooth V. Muscle Tissue Neuromuscular junction