Muscle Tissue I have added animations to these slides The picture will appear first. Decide what the picture is and any indicated structures. When you click the mouse again the answers will appear. Good Luck

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

Smooth Muscle. Look for the shape of the nuclei

Smooth Muscle

Smooth Muscle

Connective Tissue Smooth Muscle

Cardiac Muscle. Note the branched appearance

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

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

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

Cardiac Muscle. Note the numerous intercalated discs

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

Nucleus Skeletal Muscle in cross section and longitudinal section

Skeletal muscle

Higher magnification of skeletal muscle in cross section