Muscle Lecture

Muscle Lecture - AnS 214L Lab 5 Muscular System: Skeletal...

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Unformatted text preview: AnS 214L Lab 5 Muscular System: Skeletal Muscles of the Pig Muscle Types Skeletal – – – – Cardiac (Heart) Cardiac Muscle Smooth Smooth Muscle – – – – Striated Elongated cells Multinucleated cells Voluntary Skeletal Muscle Striated Branched cells 1-3 central nuclei Involuntary – Nonstriated – Single central nucleus – Involuntary Light Micrograph of Skeletal Muscle Electron Micrograph of Skeletal Muscle From: http://www.siumed.edu/~dking2/ssb/EM007b.htm Light Micrograph of Cardiac Muscle From Dr. Gwen Childs, Department of Anatomy and Neurobiology, University of Arkansas for Medical Sciences, taken from Cytochemistry.net, at http://www.cytochemistry.net/microanatomy/muscle/striated_cardiac_muscle.htm Cardiac Muscle Structure Light micrograph of mammalian cardiac muscle, showing individual cells and centrally located nuclei Electron Micrograph of Cardiac Muscle From U.C. Davis Medical Histology Website Smooth Muscle H&E Stained muscularis externa = muscle layer of intestine Spindle-shaped, mononucleated cells – 5-10 μm in diameter – 30-200 μm long Centrally-located nuclei From the Boston University Histology Learning System, at: http://www.bu.edu/histology/m/ index.htm EM of Smooth Muscle From the Boston University Histology Learning System, at: http://www.bu.edu/histology/m/index.htm Material to Know Muscle types and functions Types of smooth muscle contractions – Peristalsis – Segmentation Skeletal muscle attachments – Origin and Insertion Specific muscles in the hindleg – Biceps femoris – Quadriceps femoris – Gastrocnemius – Gracilis – Semimembranosus – Semitendinosus More Material to Know Muscles of the side – Cutaneous trunci – Longissimus – Latissimus dorsi – Obliquus externus abdominis – Rectus abdominis Specific locations of these and other muscles will be covered in the lab ...
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This note was uploaded on 02/14/2012 for the course ANS 214L taught by Professor Huiatt during the Fall '11 term at Iowa State.

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