THIS PAGE CONTAINS EVERYTHING YOU NEED TO
KNOW ABOUT MUSCLES!
DIFFERENT TYPES OF MUSCLE
These are just some of the muscles in the human body
The musculoskeletal system is made up of two organs, muscle and bone.
The organ that we are talking about now is muscle. There is about 656 diferent muscles in your body, that's about three muscles per bone. The muscles that are connected to your bones are called skeletal muscles. There's two other kinds of muscle, the heart muscle, and smooth muscle. The heart muscle is similar to skeletal muscle, but it can't be consciencely controlled. The heart muscle contracts and expands to pump blood through out your body. The smooth muscle is all the muscle ligning other organs like the intestines and blood vessels. Like the heart muscle, this
muscle can't be consciencely controlled.
The organ that we are talking about now is muscle. There is about 656 diferent muscles in your body, that's about three muscles per bone. The muscles that are connected to your bones are called skeletal muscles. There's two other kinds of muscle, the heart muscle, and smooth muscle. The heart muscle is similar to skeletal muscle, but it can't be consciencely controlled. The heart muscle contracts and expands to pump blood through out your body. The smooth muscle is all the muscle ligning other organs like the intestines and blood vessels. Like the heart muscle, this
muscle can't be consciencely controlled.
MUSCLE STRUCTURE
In skeletal muscles, are densly packed groups of hugely elongated cells called myofibers. Myofibers are grouped into bundles called facicles, a typical myofiber is 2-3 cm long and is about 0.05 mm in diameter. They are composed of narrower structures called myofabrils. Inside myofabrils are thick and thin myofilaments, mainly made up of proteins, actin and myosin. Numerous capillaries keep the muscle supplied with the oxygen and glucose needed to fuel contraction.
DIFFERENT BODY PARTS AS LEVERS
THIRD CLASS LEVER IN THE BODY
This is an example of a third class lever
THIRD CLASS LEVER IN THE AREA OF THE ARM
AF= apllied force (effort), F= fulcrum, R= resistance (load)
The third class lever is the most common type of lever in the
human body. The force is applied between the load and the
fulcrum. An example a third class lever in the human is when you
flex the elbow joint (the fulcrum) the bicep (the effort) has to
contract, which pulls the hand or fist (the load) upward.
human body. The force is applied between the load and the
fulcrum. An example a third class lever in the human is when you
flex the elbow joint (the fulcrum) the bicep (the effort) has to
contract, which pulls the hand or fist (the load) upward.
INTERSESTING FACTS ABOUT MUSCLES
DID YOU KNOW THAT:
-Muscles make up almost half the bodies weight
-If all the muscles in your body were combined, then they could
lift about 25 tonnes
-There's about 656 different muscles in your body, so that's about
3 muscles for each bone
-When you'r exerciseing, your muscles are driven by surger,
and that your muscles are only 25% efficient
-1 quater of chemical energy from muscle fuel is turned into
useful power, the other 3 quaters is turned into wasted heat.
-Muscles make up almost half the bodies weight
-If all the muscles in your body were combined, then they could
lift about 25 tonnes
-There's about 656 different muscles in your body, so that's about
3 muscles for each bone
-When you'r exerciseing, your muscles are driven by surger,
and that your muscles are only 25% efficient
-1 quater of chemical energy from muscle fuel is turned into
useful power, the other 3 quaters is turned into wasted heat.