muscular strength The ability of a muscle to exert force during a contraction.
muscular system The body system that allows movement.
physical exercise Any activity that maintains or improves physical fitness and overall
health.
physical fitness The ability of your body to carry out your daily activities without getting
out of breath, sore, or overly tired.
skeletal muscle The muscle that is usually attached to the skeleton.
smooth muscle Involuntary muscle found within the walls of organs and structures such
as the esophagus, stomach, intestines, and blood vessels.
strain An injury to a muscle in which the muscle fibers tear because the muscle contracts
too much or contracts before the muscle is warmed up.
tendinitis A condition in which tiny tears form in the protein fibers of the tendon and
gradually weaken the tissue.
tendon A tough band of connective tissue that connects a muscle to a bone.
voluntary muscle A muscle that a person can consciously control; skeletal muscle is vol-
untary.
warm-up A slow increase in the intensity of a physical activity that prepares muscles for
an activity.
Points to Consider
- How does your muscular system depend on your digestive system?
- Howdoeswhatyouchoosetoeataffectyourmuscularsystemandyourskeletalsystem?