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Copy of Muscular System
Transcript of Copy of Muscular System
Muscular dystrophy is an inherited disorder in which your muscles can easily become damaged. Its physical symptoms include muscle weakness, lack of coordination and muscle contractures in which your muscles assume a contracted position. Falls, a waddling gait, fainting, dizziness and joint deformities are other manifestations of a muscular dystrophy. The muscular system is important because it supports the bones so that you can move. If we don't have the you wouldn't be able to do the things you love to do muscular system The muscular system is
very important, without it
we would not be able to move. There are three distinct types of muscles: skeletal muscles, cardiac or heart muscles, and smooth (non-striated) muscles. Muscles provide strength, balance, posture, movement and heat for the body to keep warm The human body contains more than 650 individual muscles which are attached to the skeleton, which provides the pulling power for us to move around. There are two types of muscles in the system and they are the involuntary muscles, and the voluntary muscles. The muscle in which we are allow to control by ourselves are called the voluntary muscles and the ones we can't control are the involuntary muscles. The heart, or the cardiac muscle, is an example of involuntary muscle. Frontalis * Protects frontal bone * Raises eyebrows Orbicularis Oculi * Tissue around eyes * Blinks and closes eyes Orbicularis Oris * Muscle around the mouth *Closes and protrudes lips * Paired muscle in the superficial layers of the anterior portion of the neck * Flexes neck and supports in head rotation Sternocleidomastoid Deltoid * Muscle forming the rounded contour of the shoulder * Assist in Shoulder abduction Biceps Brachii * Lies on the upper arm between the shoulder and the elbow * Flexes elbow and supinates forearm Pectoralis Major * Muscles that connect the front walls of the chest with the bones of the upper arm and shoulder * Adduction and rotation of the arm Rectus Abdominis * Known as "abs" or a "six pack", is a paired muscle running vertically on each side of the anterior wall of the human abdomen * Responsible for flexing the lumbar spine, as when doing a "crunch" Sartorius * Longest muscle in the body
* Long thin muscle that runs down the length of the thigh * Flexes thigh on hip Quadriceps (vastus medialis,intermedius, lateralis and rectus femoris) * Great extensor muscle of the knee, forming a large fleshy mass which covers the front and sides of the femur * Extends knee and flexes hip on thigh Tibialis Anterior * Muscle that originates in the upper two-thirds of the lateral surface of the tibia and inserts into the first cuneiform and first metatarsal bones of the foot * Dorsiflexes and inverts foot Front Muscles Back Muscles Trapezius * Large superficial muscle that extends longitudinally from the occipital bone to the lower thoracic vertebrae * Extends neck and adducts scapula Latissimus Dorsi * Larger, flat, dorso-lateral muscle on the trunk, posterior to the arm, and partly covered by the trapezius * Responsible for extension, adduction, transverse extension Triceps Brachii * Large muscle on the back of the upper limb * Extends elow Gluteus Maximus * Narrow and thick fleshy mass of a quadrilateral shape * Extends hip Gluteus Medius * Broad, thick, radiating muscle, situated on the outer surface of the pelvis * Abducts thigh Hamstring (semitendinosus, semimembranosus, biceps femoris) * Muscles that make up the borders of the space behind the knee * Flex knee and extend hip Gastrocnemius * Runs from its two heads just above the knee to the heel * Flexes foot and knee End. An inherited disease and expressed most exclusively in males. Active normal-appearing children become clumsy and begin to fall frequently as their muscles weaken. The muscular system serves three major functions in the body, producing motion, providing stabilization, and generating heat. the things you love