Essay about The Human Body The Muscular System - 543 Words

The human body is composed of many different systems working cooperatively. Unlike other body systems, there are some that are essential for circulation, locomotion and posture; the muscular system being one of those. Muscles, the main constituents of this system, are organs that serve in converting chemical signals into mechanical forces which permit the movement of the body (Campbell, 2012). The basic units of this system are muscular cells. This type of cells originates from the mesoderm where the development results in a buildup of myofilaments in the cytoplasm and the formation of specialized parts and channels. A type of muscles in the iris, which is an exception, originates from the ectoderm (Paulsen, 2010). There are several†¦show more content†¦Smooth Muscles As their name indicates, smooth muscles are â€Å"smooth† and thus lack striations unlike skeletal and cardiac muscles. The smooth muscle cells also differ in that they are mononucleated. The contractions of these cells are involuntary, but can be either tonic contractions which are slow with a little use of energy, or phasic contractions that are rapid contractions and relaxations (Campbell, 2012). To achieve proper function, the muscular system needs to work in coordination with other body systems. With the skeletal system, it provides the physical posture and the movement ability of vertebrates. The muscular system also needs to be directed by the nervous system. Some innervations are voluntary, while others are autonomous; similar to the case of cardiac muscles and smooth muscles. Because of the difference in anatomy and physiology of the different types of muscles, the means of innervations and communication varies. Paulsen D.F. (2010). Chapter 10. Muscle Tissue. In Paulsen D.F. (Eds), Histology Cell Biology: Examination Board Review, 5e. Retrieved May 23, 2014 from http://accessmedicine.mhmedical.com/content.aspx?bookid=563Sectionid=42045304. Campbell D (2012). Chapter 12. Muscles and Motility. In Janson L.W., Tischler M.E. (Eds), The Big Picture: Medical Biochemistry. Retrieved May 24, 2014 fromhttp://accessmedicine.mhmedical.com/content.aspx?bookid=397Sectionid=39898619 Mescher A.L. (2013). Chapter 10. Muscle Tissue. In MescherShow MoreRelatedThe Muscular System of the Human Body Essay1055 Words   |  5 PagesThe muscular system is a very important part of the human body. It has many components and functions, and is the source of the body’s movement. There are roughly 650 muscles in the human body and are different types of muscles. Muscles can either be voluntary or involuntary which means controlled or uncontrolled movement. Muscles have many reasons and in this paper you will widen your knowledge of muscles and their functions as well their diseases and how they help maintain the body. 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