1. Muscle Tissue
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2. Skeletal Muscle Smooth Muscle Cardiac Muscle Features Location
Attached to bone
walls of hollow organs, blood vessels, eyes, glands and skin
heart
Cell shape
very long, cylindrical
Spindle shaped
Cylindrical and branched
Nucleus
Multiple, peripherally located
Single centrally located
single centrally located
Special features
Gap junctions join visceral smooth muscle
Intercalated disks join cells
Control
voluntary and involuntary reflexes
Involuntary
Spontaneous contraction No
Yes
Function
Body movement
Food movement, urinary bladder, blood vessels, glands and duct
pumps blood

3. Smooth Muscle. Look for the shape of the nuclei

4. Smooth Muscle

5. Smooth Muscle

6. Connective Tissue
Smooth Muscle

7. Cardiac Muscle. Note the branched appearance

8. Cardiac Muscle cross section
Cardiac Muscle cross section. The centrally located nuclei are a good clue

9. Intercalated Disc
Cardiac Muscle longitudinal section
Note the striations and branching.

10. Cardiac Muscle. Note the number, appearance and location of the nuclei

11. Cardiac Muscle. Note the numerous intercalated discs

12. Skeletal Muscle
Note the striations and peripheral nuclei. The absence of branching and intercalated
discs help you know that it is not cardiac muscle

13. Nucleus
Skeletal Muscle in cross section and longitudinal section

14. Skeletal muscle

16. Higher magnification of skeletal muscle in cross section