Muscular System ▪ Contractility: ability of the muscle to shorten. ▪ Extensibility: ability of...
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Muscular System ▪ Contractility : ability of the muscle to shorten. ▪ Extensibilit y: ability of muscle to lengthen. ▪ Elasticity : ability of muscle to return to normal size. ▪ Atrophy : is the wasting of muscle tissue ▪ Hypertrophy : is the increase in size of muscle tissue. ▪ Controlled by nerve stimuli . ▪ Fed by capillaries . Characteristics common to muscle tissue
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Transcript of Muscular System ▪ Contractility: ability of the muscle to shorten. ▪ Extensibility: ability of...
Muscular System
▪ Contractility: ability of the muscle to shorten.
▪ Extensibility: ability of muscle to lengthen.▪ Elasticity: ability of muscle to return to
normal size.▪ Atrophy: is the wasting of muscle tissue▪ Hypertrophy: is the increase in size of
muscle tissue.▪ Controlled by nerve stimuli.▪ Fed by capillaries.
Characteristics common to muscle tissue
Muscular System
▪ Smooth▪ Cardiac▪ Skeletal
Different types muscle tissue
Muscle types tutorial
Muscular System
Skeletal Muscles (striated or voluntary muscles)
are those which attach to bones and have the main function of contracting to facilitate movement of our skeletons.
Different types muscle tissue
Muscular System
Smooth muscle (Unstriated) Involuntary muscle due to our inability to control its movements.
Found in the walls of hollow organs such as the stomach, esophagus, bronchi and in the walls of blood vessels.
Different types muscle tissue
Muscular System
Different types muscle tissue
Cardiac muscle only in the walls of the heart.
Similar to:skeletal muscle -striated
smooth muscle- involuntarily controlled
Muscular System
Structure of skeletal muscle Structure of skeletal muscle
Muscular SystemStructure of skeletal muscle
Epimysium:This is the connective tissue wrap just under the deep fascia that surrounds the entire muscle
Perimysium:This connective tissue surrounds each individual fascicle (bundle of muscle fibers).
Endomysium:This is the connective tissue
wrapped around each individual muscle cell (fiber).
Myofibrils: threadlike fibrils that make up the contractile part of a striated muscle fiber.
skeletal muscle structure
Structure of skeletal muscle
Muscular System
▪ Muscle fibers are made up of a group of myofibrils.
▪ Myofibrils contain myofilaments.
▪ The myofibrils have distinct, repeating microanatomical units, termed sarcomeres, which represent the basic contractile units of the muscle fiber/cell (myocyte).
▪ Myofilaments (actin & myosin) are responsible for muscle movement.
Structure of skeletal muscle Structure of skeletal muscle
Muscular System
▪ Myofilaments: (Thick and Thin)▪ Myosin: thick filaments▪ Actin: thin filaments▪ A unit of thick and thin filaments is
known as a Sarcomere.▪ These structures hold the key to
muscle contraction. The staggered thin and thick filaments has the effect as one might pull a rope towards oneself hand over hand.
Structure of skeletal muscle
Muscular SystemStructure of skeletal muscle
Muscular SystemStructure of skeletal muscle
Structure of a muscle video clip
Muscular SystemOrigin and insertion of muscles
▪ Origin: the point where the tendon attaches to the bone which does not move during muscle action.
▪ Insertion: the point where the tendon attaches to the bone which moves during an action.
▪ e.g. Action of biceps muscle: Scapula is origin (Proximal point) and radius is the insertion. (distal point)
http://www.getbodysmart.com/index.htm
Link for origin & insertion of muscles
Muscular System
State the origin and insertion of the following muscles:
(show a picture of each with your answer)Anterior muscles deltoid pectoralis major & minor iliopsoas sartorius quadriceps group (rectus femoris, vastus intermedialis, vastus medialis, vastus lateralis.)Tibialis anteriorAbdominus rectusExternal obliquesBiceps brachii
Muscular System
Muscular System
Muscular System
Muscular System
Muscular System
Muscular System
Rectus Femoris Actions: flex hip, extend knee (two joint muscle)
Vastus Lateralis Vastus Intermedius Action: extend knee (single joint muscle)Vastus Medialis
Rectus Femoris Origin – inferior pelvis Vastus Lateralis Vastus Intermedius Vastus Medialis Origin – proximal femur
Muscular System
Muscular System
Pubic symphysis
Muscular System
Muscular System
Muscular System
State the origin and insertion of the following muscles:
(show a picture of each with your answer)Posterior Muscles Trapezius triceps brachii latissimus dorsi gluteus maximus hamstrings group (biceps femoris, semitendinosus, semimembranosus) gastrocnemius soleus erector spinae
Muscular System
Base of skull(occipital protuberance)
Muscular System
Muscular System
Olecranon process
Muscular System
Muscular System
Medial Hamstrings
Lateral Hamstrings
Muscular SystemTwo Joint Muscle
Muscular SystemOne Joint Muscle
Muscular System
