Muscle Tissue: composed of cells (‘fibers’) specialized for contraction – Skeletal.
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Transcript of Muscle Tissue: composed of cells (‘fibers’) specialized for contraction – Skeletal.
•Muscle Tissue: composed of cells (‘fibers’) specialized for contraction
– Skeletal
•Muscle Tissue: composed of cells (‘fibers’) specialized for contraction
– Skeletal
– Cardiac
•Muscle Tissue: composed of cells (‘fibers’) specialized for contraction
– Skeletal
– Cardiac
– Smooth
•Muscle Tissue: composed of cells (‘fibers’) specialized for contraction– Skeletal – Cardiac – Smooth All muscle tissues have a reticular fiber matrix
• Skeletal Muscle Tissue
– Composed of closely packed skeletal muscle cells
• Skeletal Muscle Tissue
– Features of skeletal muscle cells:
• Striated
• Can be very long
• Multinucleated
• Cannot divide, but new cells can be produced from “satellite cells”
• Require neural stimulation
• Skeletal Muscle Tissue– Features of skeletal muscle cells:• Striated • Can be very long• Multinucleated• Cannot divide, but new cells can be produced from “satellite cells”• Require neural stimulation• Voluntary
– Functions of Skeletal Muscle Tissue
•Voluntary movement
– Functions of Skeletal Muscle Tissue
•Voluntary movement
• Forms some sphincters
– Functions of Skeletal Muscle Tissue• Voluntary movement• Forms some sphincters• Protection of some organs• Stabilization of some joints• Posture• Heat production
• Cardiac muscle tissue–Features of cardiac muscle cells• Striated• Branched• Intercalated disks• Cannot divide• No satellite cells• Contract rhythmically
• Cardiac muscle tissue– Features of cardiac muscle cells• Striated• Branched• Intercalated disks• Cannot divide• No satellite cells• Contract rhythmically • No neural stimulation required
• Smooth muscle tissue– Composed of smooth muscle cells– Features of smooth muscle cells• Non-striated• May not require neural stimulation• Can divide• Involuntary
– Functions of smooth muscle
• Internal movement of food, etc.
• Blood vessel diameter
• Bronchiole diameter
• Pupil diameter
•Neural Tissue
– Composed of neurons and glial cells (neuroglia)
•Neural Tissue
– Features of neurons
•Neural Tissue
– Features of neurons
• Cell body (soma)
•Neural Tissue
– Features of neurons
• Cell body (soma)
•Neural Tissue
– Features of neurons
• Cell body (soma)
• Dendrites
•Neural Tissue
– Features of neurons
• Cell body (soma)
• Dendrites
• Axons (nerve fibers)
•Neural Tissue
– Features of neurons
• Cell body (soma)
• Dendrites
• Axons (nerve fibers)
• Cannot divide (?)
– Neural tissue arranged as ‘grey matter’ and ‘white matter’