Warning: Use of undefined constant referer - assumed 'referer' (this will throw an Error in a future version of PHP) in /usr/home/essaywo/public_html/essays on line 102

Warning: Use of undefined constant host - assumed 'host' (this will throw an Error in a future version of PHP) in /usr/home/essaywo/public_html/essays on line 105

Warning: Cannot modify header information - headers already sent by (output started at /usr/home/essaywo/public_html/essays:102) in /usr/home/essaywo/public_html/essays on line 106

Warning: Cannot modify header information - headers already sent by (output started at /usr/home/essaywo/public_html/essays:102) in /usr/home/essaywo/public_html/essays on line 109
Muscles In The Human Body - Paper

Muscles In The Human Body

The musculoskeletal system is made up of bones, joints, and muscles. This system gives the body form and support, and protects the body while allowing it to move. Basically, the muscles in this system perform three important body functions: the movement of body parts, maintenance of body parts, and production of body heat.
These muscles all consist of a mass of protein fibers grouped together, and most are of mesodermal origin. And almost all of the muscle fibers you will ever have or need were present at birth. Nearly half of your body mass is muscles, the largest and strongest being in the shoulders, upper arms, hips, and thighs. There are over five hundred .
Muscle fibers are basically ...

Want to read the rest of this paper?
Join Essayworld today to view this entire essay
and over 50,000 other term papers

is made up of smaller fibers called myofibrils. These myofibrils are composed of even smaller protein filaments. These filaments can be either thick or thin. The thick filaments are made of the protein myosin, and the thin filaments are made of the protein actin. The arrangement of the myosin and actin gives skeletal muscle its striated (or striped) appearance.
Each section of a myofibril is called a sarcomere, and is the functional unit of muscle.
How muscles contract is directly related to their structure. The sliding filament theory is an explanation of how muscle contractions occur. This theory states that the actin filaments within the sarcomere slide toward one another during contraction. But, the myosin filaments don’t move. The second type of muscle is smooth, which is found in internal organs and blood vessels. It consists of collections of fusiform cells that don’t show its striations under even a light microscope. The most common function of this muscle is ...

Get instant access to over 50,000 essays.
Write better papers. Get better grades.

Already a member? Login

CITE THIS PAGE:

APA
MLA
Chicago
Turabian

Muscles In The Human Body. (2006, October 12). Retrieved November 23, 2024, from http://www.essayworld.com/essays/Muscles-In-The-Human-Body/53796

"Muscles In The Human Body." Essayworld.com. Essayworld.com, 12 Oct. 2006. Web. 23 Nov. 2024. <http://www.essayworld.com/essays/Muscles-In-The-Human-Body/53796>

"Muscles In The Human Body." Essayworld.com. October 12, 2006. Accessed November 23, 2024. http://www.essayworld.com/essays/Muscles-In-The-Human-Body/53796.

JOIN NOW

Join today and get instant access to this and 50,000+ other essays

PAPER DETAILS

Added: 10/12/2006 06:07:42 AM
Category: Science & Nature
Type: Premium Paper
Words: 859
Pages: 4

Save |

Report

SHARE THIS PAPER

SAVED ESSAYS

Save and find your favorite essays easier