Moving the human body Muscle-an organ that contracts and gets shorter- this provides the force to move your body parts. Muscles of the body
Muscle Control Voluntary muscles- muscles that you are able to control Examples are leg and arm muscles Involuntary Muscles- you can not move them consciously. They just keep working Examples- heart
Types of Muscles-skeletal Skeletal Muscles-muscles that move bones Attached to bones by tendons Most numerous in the body Look striped or striated Voluntary muscles
Types of Muscles-Smooth Muscles Smooth muscles- nonstriated Involuntary Move the internal organs Contract and relax slowly Example- small intestine
Types of Muscles-Cardiac Muscle Cardiac muscle-found only in the heart Involuntary Striations Contracts about 70 times a minute every day of your life.
Types of Muscles Types of muscles
How Muscles Work Skeletal muscles-when one muscles contracts- another muscle relaxes Muscles always pull- never pushes Muscles use glucose Produce thermal energy when they contract Muscles that are not exercised become smaller How muscles work
Muscles and bones work together Working together A review