mus_081610_muscles
DESCRIPTION
16 August 2010Musculoskeletal-Integumentary ModuleHistology LaboratoryMusclesTRANSCRIPT
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MUSCLE
Lab # 3August 16, 2010
ASMPH 2015
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SKELETAL MUSCLE (STRIATED MUSCLE)
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Striated Muscle l.s.
On yellow pointers: NUCLEUS of the Muscle
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Striated Muscle l. s.
Dark Band (A band): very fine light space in between is the H band, where the M line is found.
Light Band (I band): very light line in between is the Z line
Middle of light band to another middle of light band (Z line to Z line) = sarcomere
Observe the alternating light and dark bands
Multi-nucleated
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Striated Muscle l. s.
Light Band (I band): very light line in between is the Z line
Dark Band (A band): very fine light space in between is the H band, where the M line is found.
Middle of light band to another middle of light band (Z line to Z line) = sarcomere
Nucleus
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Sarcomere: from the Net
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Striated Muscle (c.s.) -- LPO
Fascicle•Enclosed within red dashed lines•Group of muscle cells
Perimysium•Connective tissue that surrounds fascicles
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Striated Muscle (c.s.) -- HPO
Fascicle•Encircled within red dashed lines•Group of muscle cells
Perimysium•Connective tissue that surrounds fascicles
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Striated Muscle (Scanner 40x)
Perimysium
Blood vessel
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Striated Muscle (LPO 100x)
Perimysium
Endomysium
Fascicle
Blood vessel
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SMOOTH MUSCLE
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Smooth muscle l.s.
Note: Spindle shaped cell, centrally located nucleus and eosinophilic cytoplasm
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Smooth Muscle c.s. l.s.
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Duodenum HD168
Smooth muscles of the Outer wall of
the GIT
Inner circumferential (circular) layer
Outer longitudinal layer
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Esophagus HD159A Lower Region
Smooth muscles of the Outer wall of
the GIT
Outer longitudinal layer
Inner circumferential (circular) layer
Muscularis propria
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Smooth Muscle: Jejunum (LPO)
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Smooth Muscle: Jejunum (HPO) L.S.
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Smooth Muscle: Jejunum (HPO)
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ILEUM (4x)
Outer longitudinal layer
Inner circumferentially-arranged layer
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ILEUM (10x)
Outer longitudinal layer
Inner circumferentially-arranged layer
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ILEUM (40x)
Outer longitudinal layer
Inner circumferentially-arranged layer
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Epithelial Layer
Connective Tissue Layer
Inner Smooth Muscle Layer
Outer Smooth Muscle Layer
Large Intestine
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Large Intestine
Outer longitudinal layer of smooth
muscle
Inner circumferential layer of smooth
muscle
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Large Intestine, HPOInner circumferential layer of
smooth muscle
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Large Intestine, HPOOuter longitudinal layer
of smooth muscle
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Smooth Muscle: Arrector Pili
Shown on pointer
- Part of the pilosebaceous unit (with hair follicle and sebaceous gland)
- Makes hair stand on end
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Smooth Muscle: Arrector Pili
On pointer: Close-up of arrector pili muscle
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ARTERY AND VEIN [LPO]
Smooth Muscle
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SMOOTH MUSCLE - ARTERY AND VEIN [HPO]
Tunica MediaSmooth Muscle cells (and elastic fibers)
ARTERY AND VEIN [HPO]Tunica Intima- Endothelium and elastic fibers
Tunica Adventitia- collagen and elastic fibers
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CARDIAC MUSCLE
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Cardiac Muscle Heart (l.s.)
Nuclei
IntercalatedDiscs