Doctors can seldom explain why one person gets pancreatic cancer and another does not. However, it is clear that this disease is not contagious. No one can catch cancer from another person. Research has shown that people with certain risk factors are more likely than others to develop pancreatic cancer. A risk factor is anything that increases a person's chance of developing a disease.
Three types of muscles. The muscular system can be broken down into three types of muscles: skeletal, smooth and cardiac, according to the NIH. Skeletal muscles are the only voluntary muscle tissue in the human body and control every action that a person consciously performs.Most skeletal muscles are attached to two bones across a joint, so the muscle serves to move parts of those bones closer to each other, according to The Merck Manual.isceral, or smooth, muscle is found inside organs such as the stomach and intestines, as well as in blood vessels. It is called a smooth muscle because, unlike skeletal muscle, it does not have the banded appearance of skeletal or cardiac muscle.
Muscular System. The muscular system is composed of more than 600 muscles. These include the involuntary muscles of the heart and the smooth muscles of the internal organs. The skeletal muscles connect to the bones and work with connective tissue at the joints to allow for movement.The muscles connect to the nervous system and allow initiation of movement through nerve signals to and from the brain.he skeletal system and the muscular system work together as the framework for the body as well as providing the pieces that allow for movement.