EXSC300 Part 1 Spring 2009lecture black and white slides

EXSC300 Part 1 Spring 2009lecture black and white slides -...

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1 Exercise Science 300 – Physiology of Exercise Spring 2009 Skeletal Muscle Anatomy • Objectives – To understand • Basic components of muscle cell • The structure and striation pattern • The significance of the architecture • The basic developmental process
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2 History of Skeletal Muscle The history of Skeletal muscle anatomy Extends from early examinations of sacrificial victims to the sophisticated analyses of the body performed by modern scientists. It has been marked, over time, through dissection of cadavers to technologically complex techniques developed in the last century.
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3 Ancient anatomy As early as 1600 BC, Egyptian On anatomical papyrus that has survived to this day identifies a number of organs and shows a basic knowledge of blood vessels. (460-377 BC) Hippocrates, Greek physician active in the late 5th and early 4th centuries BC His work demonstrates a basic understanding of musculoskeletal structure, In the 4th century BC, –A r is to t
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4 In the 2 nd Century, Galen The final major anatomist of ancient his time He compiled much of the knowledge obtained by previous writers, and furthered the inquiry into the function of organs by performing dissections on animals. His collection of drawings based His collection of drawings, based mostly on dog anatomy, would hold as a " Gray's Anatomy of the ancient world " for 1500 years. Muscle (from Latin musculus "little mouse" ) Contractile tissue of the body Is derived from the mesodermal layer of embryonic germ cells. Its function is to produce force and cause motion, either locomotion or movement within internal organs. Much of muscle contraction occurs without conscious thought and is necessary for survival, like the contraction of the heart, or peristalsis (which pushes food through the digestive system). Voluntary muscle contraction is used to move the body, Can be finely controlled, • like movements of the finger or gross movements like quads. There are 2 types of muscle movement, slow fast twitch. – Slow twitch movements act for a long time but not very fast, – Fast twitch movements act quickly, but not for a very long time.
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5 Skeletal Muscle • The largest tissue in the organism • Tremendous Ability to alter • Is metabolically active • Animals use muscles to convert the chemical energy of ATP into mechanical work • Three different kinds of muscles are found in vertebrate animals 3 different kinds of muscles Heart muscle (A.K.A. . Cardiac muscle) – Makes up the wall of the heart. – Throughout life,
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EXSC300 Part 1 Spring 2009lecture black and white slides -...

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