Post on 18-Dec-2015
transcript
Histology
Muscle Lab
Stephen Ernst, Ph.D. / Matt Velkey, Ph.D.
58 Skeletal Muscle
Longitudinal
Striations
Striated Muscle Fiber (cell)
Peripheral Flattened Nuclei
Endomysium
58L Skeletal Muscle
2 consecutive Z line =
Sarcomere
Dark A Band (myosin)Light I Bands(actin)
Divided by Z Line
Slide 58 Skeletal MuscleCross Section
Muscle Fibers
Peripheral Nuclei
Skeletal Muscle
Peripheral Nerve
Slide 59 H&E(Use this slide to examine CT layers in skeletal muscle; ignore, nerve fasicles which are also present)
Slide 59 Skeletal MuscleCross Section H&E Stain
Epimysium
Perimysium
Individual MusclesTendon
Epidermis Adipose TissueDermis
SKIN:
Epimysium
Perimysium
Endomysium
Slide 59 Trichrome Stain
Slide 71 (even)Slide 71 (even)
Muscle fibers (purple)Muscle fibers (purple)
Neuromuscular junctions
Neuromuscular junctions
AxonsAxons
Slide 71 (even)Slide 71 (even)
Neuromuscular Junctions(a.k.a. motor end plates)Neuromuscular Junctions(a.k.a. motor end plates)
Slide 71 (even)Slide 71 (even)
AxonAxon
Node of RanvierNode of Ranvier
Neuromuscular junctionNeuromuscular junction
Slide 71 (even)Slide 71 (even)
Neuromuscular junction(viewed from top)Neuromuscular junction(viewed from top)
AxonAxon
Slide 71 (even)Slide 71 (even)
Neuromuscular junction(viewed from top)Neuromuscular junction(viewed from top)
AxonAxon
Slide 71 (odd)Slide 71 (odd)
Neuromuscular spindleNeuromuscular spindle
Skeletal muscleSkeletal muscle
Slide 71 (odd)Slide 71 (odd)
Skeletal muscle (extrafusal fibers)Skeletal muscle (extrafusal fibers)
outer capsule of neuromuscular spindleouter capsule of neuromuscular spindle
Intrafusal fibersIntrafusal fibers
inner capsuleinner capsule
Slide 71 (odd)Slide 71 (odd)
Peripheral nerveNOT a neuromusclar spindle!
Peripheral nerveNOT a neuromusclar spindle!
Skeletal muscle(extrafusal fibers)Skeletal muscle
(extrafusal fibers)
57 Cardiac Muscle
IntercalatedDisk
(Note: Slide 98 is also quitegood for Intercalated disks) Longitudinal Fibers
Cross Sectioned Fibers
branching
Large Nucleicentrally placed
29 Smooth Muscle (Intestine)
Cross Section
Longitudinal Section
Loose Connective Tissue
Small,Fusiform (spindle shaped)FiberCentral Flattened Nucleus
250 Vagina Smooth Muscle
Cross Section Smooth Muscle
Fasicle
Longitudinal Smooth Muscle Fasicle
CT
CT
CT
250 High Power Smooth Muscle Fasciles
CTSmooth Muscle