George Soria Muscular System Period …
George Soria Muscular System Period : 2
Major functions of the Muscular System
Muscles are responsible for all types of body movement.
are attached to tendons and those tends are attached to bones.
form the heart wall for protection.
control movements inside internal organs.
Name of Muscles
Pectoralis major (Chest)
Biceps Brachii (Arm)
Rectus abdominis (Abs)
External obliques (Stomach)
Rectus femoris (Thigh)
Rhomboid Major (Back Shoulder)
Latissimus Dorsi (Back)
Gluteus Maximus (Butt)
Gluteus Medius (Butt)
Biceps femoris (Thigh)
Structure and organizational levels of the skeletal muscle.
is for energy and
is for oxygen storage
Epimysium: The layer of connective tissue around each whole muscle
Aponeuroses: Are broad sheets of connective tissue
Fascia: Surround and separate each muscle
Thin Filaments are composed of proteins like
The sarcoplasm contains parallel
made-up of actin filaments are anchored to Z lines
are made-up of overlapping
is associated with
Body Movements Terminology
Insertion: The end of a muscle attached to the bone that moves when a muscle contracts.
Origin: The end of a muscle that attaches to the bone that does not move when contraction or the muscle occurs.
Flexion: Decreases the angle between two bones.
Extension: increases the angle between two bones.
Prime mover: muscle whose contraction is mainly responsible for producing a given movement
Synergist: Muscle whose contractions help the primary mover.
Antagonist: muscle whose actions oppose the action of a prime number.
Physiology of muscle contraction
Motor Neuron: Nerve cell that stimulates skeletal muscle
Motor Unit: Made of one motor neuron and cell muscle fibers
Axon: Long portion of nerve releases a chemical called a neurotransmitter
Synapse: Connection between nerve with muscles and other organs.
Synaplic elect: gap between between neuron and sarloemma.