Carrie Chapman Catt (January 9, 1859 â March 9, 1947) was an American women's suffrage leader who campaigned for the Nineteenth Amendment to the United States Constitution, which gave U.S. women the right to vote in 1920.[1] Catt served as president of the National American Woman Suffrage Association and was the founder of the League of Women Voters ...
Muscular System. 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.
The muscular system primary job is to move the bones of the body not just that but muscle also makes the heart beat along with other organs. Muscle movement happens when signals produce electrical changes in muscle cells. They vary from the tiny muscles that move our eye balls in our sockets to the large muscle in our thighs. Opposing groups of muscles are muscles that contracts and relaxes at the same time such as straighten our knees. There are 3 types of muscle tissue: Skeletal muscle: this muscle creates movement in the body. There are more than 600 skeletal muscles, and they makes up about 40 percent of a personâs body weight. When the nervous system signals the muscle to contract, groups of muscles work together to move the skeleton.