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Histology - Muscle Tissue Images

Anatomy and Physiology28 CardsCreated 7 months ago

Thin filaments in muscle tissue are primarily composed of actin, along with tropomyosin and troponin (in skeletal and cardiac muscle). They interact with thick filaments (myosin) to enable contraction. In longitudinal section, smooth muscle fibers appear elongated and spindle-shaped with central nuclei. There are no striations, and cells are arranged in sheets or layers.

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Thin Filament

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Key Terms

Term
Definition

Thin Filament

Smooth Muscle - Longitundinal and cross sectional

Myoepithelial - Eccrine Sweat Glands - ecotoderm derived

Smooth Muscle - trichrome

Cardiac Muscle - striated, derived from mesoderm, rich capillary beds in intercellular connective tissue

Muscle Spindle

Related Flashcard Decks

TermDefinition

Thin Filament

Smooth Muscle - Longitundinal and cross sectional

Myoepithelial - Eccrine Sweat Glands - ecotoderm derived

Smooth Muscle - trichrome

Cardiac Muscle - striated, derived from mesoderm, rich capillary beds in intercellular connective tissue

Muscle Spindle

Myoepithelial - Eccrine Sweat Glands - ecotoderm derived

T-Tubule

Smooth Muscle

macula adherens (desmosomes) - cardiac tissue

Contracting thin and thick filaments in hexagonal pattern

Purkinje Fibers

Type II skeletal muscle - fast glycolytic - anaerobic respiration

Cardiac Muscle

Neuromuscular synapse showing junctional folds and synaptic vessels

Duchenne muscular dystrophy skeletal muscle

Myosin Molecule

Intercalcated Discs in Cardiac Tissue

Type 1 Skeletal Muscle - slow oxidative - aeroboic respiration

Skeletal Muscle Cross Section

fascia adherens (zonula adherens)

Sarcomere

corckscrew nucleus

Sarcomere

Neuromusclular synapse

Skeletal Muscle

Thick Filament

Cardiac muscle - cross section