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’