plural snack bars. snack bar. noun. plural snack bars. Learner's definition of SNACK BAR. [count] : a public place where small meals and snacks are served usually at a counter. There's a snack bar at the pool where we can get nachos.
All muscles exert their force by pulling between at least two points of attachment. The movement that results from contraction is called the action of the muscle. Typically, one attachment remains stationary and is called the origin and the other attachment moves and is called the insertion. Almost all muscles cross at least one joint (moveable connection between two bones) and cause an action across that joint.
Muscles are responsible for maintaining posture, physical movement (sitting, walking, eating, etc), and movement of internal organs (such as keeping the heart pumping to circulate blood and moving food through the digestive system). The word muscle is derived from the Latin term musculus, meaning little mouse.This Latin term could be due to the shape of some muscles or because muscles contracting under the skin can look like a mouse moving under a rug. Tendons connect our soft contracting muscle to our hard bones.There are around 650 skeletal muscles in the human body.t is only found in the heart and is responsible for keeping the heart pumping. Muscle makes up around half of the total human body weight. Muscle tissue is also around 15% denser than fat tissue. It takes 17 muscles in the face for us to smile and 43 muscles to frown.