Muscular system Flashcards
Functions of muscular system (3)
Movement
Body heat production
Posture and support of body
Properties of muscle (4)
Irritability
Contractility
Extensibility
Elasticity
Attached to the skeleton and are responsible for voluntary body movements
Skeletal muscles
Occur mainly in blood vessels and tubular organs of the GI tract, reproductive, and urinary, respiratory systems
Smooth muscles
Muscle found only in the wall of the heart
Cardiac muscle
3 classifications of muscle
Skeletal muscle
Smooth muscles
Cardiac muscle
The only voluntary muscles in the body
Skeletal muscles
Connective tissue that attaches the muscle to bone
Tendons
Less moveable attachment of the muscle
Origin
The more moveable attachment of the muscle
Insertion
The fleshy thick part of the muscle; also called the gaster
Belly
Associated connective tissues (4)
Endomysium
Perimysium
Epimysium
Fascia
Binds individual fibers together and supports capillaries and nerve endings
Endomysium
Another sheath covering that binds groups of muscle fibers together into bundles called fasciculi
Perimysium
Sheath covering the entire muscle
Epimysium
Fibrous connective tissue that covers the muscle and attaches to the skin
Faschia
Functional grouping of muscle (8)
Flexor
Extensor
Sphincter
Synergists
Abductor
Adductor
Antagonist
Agonist
[Muscle] decreases the angle of the joint
Flexor
[Muscle] increases the angle of the joint
Extensor
[Muscle] pull a limb toward the median plane
Adductor
[Muscle] move the limb away from the median plane
Abductor
Muscles that encircle an opening; either striated or smooth
Sphincter
Muscles directly responsible for producing the desired action
Agonist
Muscle that is relaxing
Antagonist
Muscles that oppose any undesired action of the agonists
Synergists
