Muscular System

Topics: Muscle, Cardiac muscle, Muscular system, Heart / Pages: 2 (413 words) / Published: Dec 28th, 2012
``DIFINITION
The muscular system is an organ system consisting of skeletal, smooth and cardiac muscles. It permits movement of the body, maintains posture, and circulates blood throughout the body Muscles provide strength, balance, movement and heat for the body to keep warm

There are three distinct types of muscles: skeletal muscles, cardiac or heart muscles, and smooth (non-striated) muscles
Skeletal muscle is a form of striated muscle tissue existing throughout the human body, and which is under control of the somatic nervous system;
Cardiac muscle (heart muscle) is a type of involuntary striated muscle found in the walls and histological foundation of the heart, specifically the myocardium

. Smooth muscle is an involuntary non-striated muscle
Smooth muscle is found within the walls of blood vessels such as in the tunica media layer of large (aorta) and small arteries, arterioles and veins. Smooth muscle is also found in lymphatic vessels, the urinary bladder, uterus (termed uterine smooth muscle), male and female reproductive tracts, gastrointestinal tract, respiratory tract
FUNCTION
. Skeletal Muscles Create Movement
Skeletal Muscles Protect Organs
Cardiac Muscle Pumps Blood Smooth Muscle Aids Digestion
Smooth Muscle Ensures Blood Flow
Components
* There are three parts to the muscular system: * the muscles themselves, * nerve tissues and connective tissues. * The connective tissues (tendons) attach the muscles to the skeletal system. * The nerve tissues conduct the electrical impulses that control the muscles.

Muscle characteristic * irritability,: denotes how a muscle responds when it receives an electrical impulse or is damaged * contractibility,: is how muscles move; they shorten, then relax to control the bones they are attached to * extensibility . When muscles are stretched, they are demonstrating extensibility, * elasticity. which allows the muscles to avoid damage. A

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