Muscles of the body

Topics we will be covering

• What are muscles?• What are the types of muscles?• What do muscles do?

What are Muscles?

• A body tissue that contracts or shortens making body parts move

What Are Muscles

• There are about 650 muscles in the human body

• Muscle mass makes up about half of a persons body weight

• Made up of muscle, tendons, nerves and blood vessels

What are the types of muscles?

• Smooth Muscle or Visceral Muscle– Involuntary muscles found within the walls of

organs – Found in the esophagus, Stomach, Blood vessels,

bronchi, bladder and many more areas– Weakest of all muscle– Stretches the most out of the 3 types of muscle

What are the types of muscles?

• Skeletal muscles– Voluntary muscles anchored by tendons to the

bones– Used in skeletal movement and maintaining

posture– 35%-45% of all body mass is skeletal muscle– Most attach to bones across joints to pull the

bones together

What are the types of muscles?

• Skeletal Muscle– Usually comes in pairs to move a joint two

different directions

What are the types of muscles?

• Cardiac Muscle– Involuntary muscle that is built like skeletal muscle– Only found in the heart– Does not get fatigued

What do muscles do?

• Cardiac and skeletal muscle are striated or appear in bands which is a sign that they are very strong unlike visceral muscle

• Tendons are tough bands of connective tissue that attach muscles to bones.

What do muscles do?

• Origin and insertion– The origin is the stationary bone the insertion is

the movable bone