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SEHS Topic 1.2 The Muscular System. Outline the general characteristics common to muscle tissue Contractility Extensibility Elasticity Atrophy Hypertrophy.

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Presentation on theme: "SEHS Topic 1.2 The Muscular System. Outline the general characteristics common to muscle tissue Contractility Extensibility Elasticity Atrophy Hypertrophy."— Presentation transcript:

1 SEHS Topic 1.2 The Muscular System

2 Outline the general characteristics common to muscle tissue Contractility Extensibility Elasticity Atrophy Hypertrophy Control by nerves Serviced by capillaries

3 Cont’d Contactility - the ability of muscle tissue to contract (when its thick (myosin) and thin (actin) filaments slide past each other)

4 Cont’d Extensibility - Muscle extensibility refers to the ability of a muscle group to lengthen. This involves both contractile muscle and ligaments. Elasticity - refers to the ability of your muscle and joints to stretch and contract in different directions while retaining their normal length and tension at rest.

5 cont’d Atrophy and Hypertrophy Muscular atrophy means that muscle that was there has degenerated. - It can happen because of disuse (like if you have a broken bone that's in a cast for a period of time) or because innervation to that muscle has been interrupted (as with a spinal cord injury), or any other reason that it isn't being used.

6 Cont’d Hypertrophy – A nontumorous enlargement of an organ or a tissue as a result of an increase in the size rather than the number of constituent cells

7 Cont’d –Nerve connection & capillaries

8 Distinguish between the different types of muscle 1. Smooth; 2. Cardiac; 3. Skeletal

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10 Annotate the structure of skeletal muscle Limit to epimysium, perimysium, endomysium, muscle fibers, myofibril, sarcomere, actin and myosin

11 Labeled

12 Define the terms origin and insertion of muscles Origin – the attachment of a muscle tendon to a stationary bone Insertion – the attachment of a muscle tendon to a moveable bone

13 Identify skeletal muscle from the Anterior part of the body Must include: Deltoid, pectoralis, illiopsoas, sartorius, quadraceps femoris (rectus femoris, vastus intermedialis, vastus medialis, vastus lateralis), tibialis anterior, abdominus rectus, external obliques and biceps brachii

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15 Identify the location of skeletal muscle form the Posterior region of the body Must include: Trapezius, triceps brachii, latissimus dorsi, gluteus maximus, hamstrings (biceps femoris, semitendinosus, semimebranosus), gastrocnemius, sloeus, erector spinae

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