People with urge incontinence tend to have to pass urine frequently; sometimes having to get up to go to the toilet during the night. Bladder muscles can activate involuntarily because of damage to the nerves of the bladder, the nervous system, or to the muscles themselves.
The muscular system is made up of tissues that work with the skeletal system to control movement of the body. Some musclesâlike the ones in your arms and legsâare voluntary, meaning that you decide when to move them. Other muscles, like the ones in your stomach, heart, intestines and other organs, are involuntary.
MEDAL AND FAN AWARDED How do the muscles in the human body help with movement? A. They help the bones bend. B. They squeeze the bones. C. The ligaments on the muscles push the bones apart. D. Muscles contract and thus pull on bones to cause movement.