Musculoskeletal system

Musculoskeletal system

The musculoskeletal system (also known as the locomotor system) is an organ system that gives animals the ability to physically move using the muscles and skeletal system. The musculoskeletal system provides form, stability, and movement to the human body. It consists of the body's bones (which make up the skeleton), muscles, tendons, ligaments, joints, cartilage, and other connective tissue. The term "connective tissue" is used to describe the tissue that supports and binds tissues and organs together. Its chief components are elastic fibers and collagen, a protein substance.(reword)

Human Musculoskeletal System

Hydrostatic Musculoskeletal System

Among others, cnidarians and annelids, have a hydrostatic skeleton . Hydrostatic skeletons consist of fluid-filled chambers. These closed chambers use internal pressures generated by muscle contractions causing locomotion for the arm, as well as maintaining the shape of the animals. Animals such as the earthworm and the sea anemone use these hydrostatic skeletons to change their body shape as they move forward. The sea anemone has one set of longitudinal muscles in the outer layer of the body, and a layer of circular muscles in the inner layer of the body. The anemone can elongate or contract its body by contracting one or the other set of muscles [ cite web|url= |title=Muscular and Skeletal Systems |accessdate=2008-10-05 |last=Farabee |first=M.J. |date=2001 ] . Arthropodas have their muscles attached to an exoskeleton.

Muscle Contraction Initiation

In mammals, when a muscle contracts, a series of reactions occur. Muscle contraction is stimulated by the motor neuron sending a message to the muscles from the somatic nervous system. Depolarization of the motor neuron results in neurotransmitters being released from the nerve terminal. The space between the nerve teminal and the muscle cell is called the neuromuscular junction. These neurotransmitters diffuse across the synapse and bind to specific receptor sites on the sarcolemma (cell membrane of the muscle fiber). When enough receptors are stimulated, an action potential is generated and the permeability of the sarcolemma is altered. This process is known as initiation.


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • musculoskeletal system — noun the system of muscles and tendons and ligaments and bones and joints and associated tissues that move the body and maintain its form • Hypernyms: ↑system • Part Holonyms: ↑body, ↑organic structure, ↑physical structure • Part Meronyms: ↑ …   Useful english dictionary

  • musculoskeletal system — the muscles (muscular system) and bones (skeletal system) of the body considered as one unit …   Medical dictionary

  • Human musculoskeletal system — A musculoskeletal system (also known as the locomotor system) is an organ system that gives animals (including humans) the ability to move using the muscular and skeletal systems. The musculoskeletal system provides form, support, stability, and… …   Wikipedia

  • Musculoskeletal abnormality — Classification and external resources ICD 10 Q65 Q79 ICD 9 …   Wikipedia

  • Musculoskeletal disorder — Musculoskeletal disorders Classification and external resources MeSH D009140 Musculoskeletal disorders (MSDs) can affect the body s muscles, joints, tendons, ligaments and nerves. Most work related MSDs develop over t …   Wikipedia

  • Musculoskeletal physiology — is the branch of physiology which addresses the processes of musculoskeletal system.[1] In subclassifying musculoskeletal physiology, MeSH emphasizes the division between phenomena and processes . It is also possible to emphasize the division… …   Wikipedia

  • musculoskeletal — Relating to muscles and to the skeleton, as, for example, the m. system. * * * mus·cu·lo·skel·e·tal .məs kyə lō skel ət əl adj of, relating to, or involving both musculature and skeleton <musculoskeletal defects> <the musculoskeletal… …   Medical dictionary

  • musculoskeletal — /mus kyeuh loh skel i tl/, adj. concerning, involving, or made up of both the muscles and the bones: the musculoskeletal system. [1940 45; MUSCULO + SKELETAL] * * * …   Universalium

  • Work Related Musculoskeletal Disorders — (WMSD s) are disorders of the muscles, skeleton and related tissues which have been empirically shown or are suspected to have been caused by a workplace activity (particularly a repetitive activity), for this reason the term Repetitive strain… …   Wikipedia

  • ICD-10 Chapter IX: Diseases of the circulatory system — International Statistical Classification of Diseases and Related Health Problems 10th Revision Chapter Blocks Title I A00–B99 Certain infectious and parasitic diseases II C00–D48 Neoplasms III D50–D89 Diseases of the blood and blood forming… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”