Muscular System Presentation PDF

DAVAO DEL SUR STATE COLLEGE A State College for the ASEAN and Beyond Muscular System  Muscular System  Seeing how your muscular system moves the animal’s body  Differentiating the three types of muscle tissue  Understanding how muscles contract  Taking a tour of the skeletal muscles N...

DAVAO DEL SUR STATE COLLEGE A State College for the ASEAN and Beyond Muscular System  Muscular System  Seeing how your muscular system moves the animal’s body  Differentiating the three types of muscle tissue  Understanding how muscles contract  Taking a tour of the skeletal muscles Note: Student is encouraged to use some of the online resources that accompany this text to help the visualization of these structures. www.dssc.edu.ph  Muscular System Is the system of the body that provides motor power for all movements of body parts. Muscles Are special type of tissues in the body that posses the ability of contraction and relaxation. They can contract actively thus producing force for different body movements. www.dssc.edu.ph  Functions of muscular system Support Movement Maintain body temperature (homeostasis) Movements of fluid in the cardiovascular and lymphatic system Protection www.dssc.edu.ph Properties of muscle  Excitability - ability to responds to stimulation  Contractility - the ability to shorten actively and exert a pull or tension that can be harnessed by connective tissues  Extensibility - ability to contract over a range of resting lengths  Elasticity - the ability to rebound towards its original length after a contraction www.dssc.edu.ph Types of muscle www.dssc.edu.ph Muscular System Types of muscle : Skeletal Muscle comprises majority of body muscle mass. Muscles attached to the skeleton striated, voluntary muscles - that are involved in the movement of the skeleton. Skeletal muscles can be intentionally controlled by the animal Long cylindrical cells Many nuclei per cell (peripherally located) www.dssc.edu.ph Muscular System Types of muscle : Smooth Muscle No striations Individual cells are spindle shaped with centrally located nuclei. Filaments are not arranged in order Involuntary Slow wave-like contractions www.dssc.edu.ph Muscular System Types of muscle: Cardiac Muscle branching cells one or two nuclei per cell striated involuntary medium-shaped contractions Found only in the heart Forms the wall of the heart & contracts to circulate the blood www.dssc.edu.ph