bell work write about a time you injured a muscle ?
TRANSCRIPT
OBJECTIVES
explain the functions of the muscular system.
identify how muscle types differ.
describe ways to keep your muscular system healthy.
MUSCLE FACTS
The human body has over 600 voluntary/skeletal musclesMuscles are made of microscopic filaments which contract and slide over each other causing the the muscles to shorten and therefore contract.There are fast-twitch and slow-twitch muscles.The largest muscle is the Gluteus Maximus, the muscles of the buttocks• The strongest muscles are:
– The Soleus, part of the calf muscle, below the calf muscles, as it can apply the most force.
– The Masseter, also known as the jaw muscles
TYPES OF MUSCLES
skeletal muscles The muscles attached to bones that enable you to moveSkeletal muscles are voluntary.
TYPES OF MUSCLES
smooth muscles Muscles found in organs, blood vessels and glandsSmooth muscles are involuntary.
TYPES OF MUSCLES
cardiac muscles Muscles found only in the walls of your heartCardiac muscles are involuntary.
HOW MUSCLES WORK
When you bend your arm, your biceps contract and pull on a bones of your lower arm. At the same time, the triceps extend.
1When you straighten your arm, your triceps contract and pull on the other bone in your lower arm. At the same time, the biceps extend.
2
PROBLEMS WITH THE MUSCLULAR SYSTEM
Muscle strain is caused by small tears in a muscle or tendon.Strains usually occur in large muscles that have been overworked.
PROBLEMS WITH THE MUSCULAR SYSTEM
Muscular dystrophy is an inherited disease, and causes skeletal muscle tissue to gradually waste away.
CARE FOR THE MUSCLAR SYSTEM
Regular exercise helps maintain the natural tension in muscle fibers, called muscle tone.