mbbs ims msu

[object Object],[object Object],[object Object]

Types of Muscle Tissue ,[object Object],[object Object],[object Object],[object Object]

Function of Skeletal Muscles ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Gross to Microscopic Anatomy Each skeletal muscle cell (fiber) is wrapped by 3 layers of connective tissue.

Epi-, Peri-, and Endomysium ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Epimysium = On top of the muscle Perimysium = Around a bundle of myofibers Endomysium = Surrounds each myofiber

Perimysium contains? Endomysium contains?

Arrangement of Motor Units within a Skeletal Muscle

Blood and Nerve Supply ,[object Object],[object Object],[object Object],[object Object],[object Object]

Origin and Insertion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Microanatomy of Skeletal Muscle Fibers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Multiple nuclei on periphery

Microanatomy Myofiber (= cell) Myofibrils Myofilaments

Myofiber (cell) Myofibrils Myofilaments Actin & Myosin Myofilaments

Sarcomere (= thick + thin filaments) ,[object Object],[object Object],[object Object],[object Object]

Sarcomere Structure Z - line A- band = dArk band I - band = lIght band

Motor Unit ,[object Object],[object Object],[object Object],[object Object],[object Object]

Neuromuscular Junction LM x230

Muscle Control ,[object Object],[object Object],[object Object]

Muscle Hypertrophy vs. Atrophy ,[object Object],[object Object],[object Object],[object Object],[object Object]

Three Types of Skeletal Muscle Fibers (fast, slow, intermediate) ,[object Object],[object Object],[object Object],Most skeletal muscles contain mixture of fiber types. Proportion of fast to slow depends on training and development One motor unit only contains one fiber type

1. Slow (or Red) Oxidative Fibers Type I ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],2. Fast Glycolytic Fibers Type IIx

3. Fast Oxidative Fibers Type IIa ,[object Object]

Organization (shape) of Skeletal Muscle Fibers ,[object Object],[object Object],[object Object],[object Object],[object Object]

Parallel Muscles ,[object Object],[object Object],[object Object],[object Object]

Convergent muscles ,[object Object],[object Object],[object Object]

Pennate Muscles: Unipennate ,[object Object],[object Object],[object Object],[object Object],Pennate=pinnate= Feather

Pennate Muscles: Bipennate & Multipennate Example Example

Circular Muscles ,[object Object],[object Object],[object Object]

Muscle Terminology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Naming of Skeletal Muscles ) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Types of Actions ,[object Object],[object Object],[object Object],[object Object]

Grouping of Muscles according to Primary Action ,[object Object],[object Object],[object Object]

Cardiac Muscle ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Smooth Muscle ,[object Object],[object Object],[object Object],[object Object],[object Object]

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