Muscle and Neural Tissue

Actin and Myosin

Filaments within muscle fibers

Contraction

Function of muscle fibers

Skeletal Muscle Tissue

forms the flesh of the body, cells are long, cylindrical, striated (striped) and multi-nucleated (peripheral) with many mitochondria, have blunt ends

Location of Skeletal Muscle Tissue

\-Combined with connective tissues and neural tissue in skeletal muscles

\-Attached to skeleton or skin

\- tongue

Function of Skeletal Muscle Tissue

\-Moves or stabilizes the position of the skeleton

\-guards entrances and exits to the digestive, respiratory, and urinary tracts

\-generates heat

\-protects internal organs

\-Voluntary muscle

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Skeletal Muscle Tissue

Cardiac Muscle Tissue

cells are short, branched, single nucleus, with some striations, cells connected by intercalated discs (joints between cells)
\-gap junctions allow ions to pass freely from cell to cell (rapid electrical impulse so cells beat in unison)

Location of cardiac muscle tissue

Heart

Function of cardiac muscle tissue

\-Circulates blood by causing the heart to pump

\-maintains blood pressure

\-involuntary muscle

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Cardiac Muscle Tissue

Smooth Muscle Tissue

\-Cells are short, spindle-shaped and nonstriated, single, central nucleus

\-When contracts, cavity becomes smaller, when relax they expand

\-Moves slower than other muscle types

Location of smooth muscle tissue

Found in the walls of hollow organs: digestive, respiratory, urinary and reproductive organs, blood vessels, skin (arrector pili)

Function of smooth muscle tissue

\-Moves food, urine and reproductive tract secretions

\-controls diameter of respiratory passageways

\- regulates diameter of blood vessels

\-Involuntary muscle

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Smooth Muscle Tissue

Location of Neural Tissue

Brain, spinal cord, nerves

Function of Neural Tissue

Communicate through electrical impulses

Neuron

cell body with dendrites, long axon

Neuroglia

designed to insulate, support, and protect neurons

Neurons and Neuroglia

The 2 types of neural tissue

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Neuron

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Neuroglia

Intercalated discs

joins between cells

Gap junctions

allow ions to pass freely from cell to cell (rapid electrical impulse so cells beat in unison)