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Skeletal system: Difference between revisions
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== Endoskeleton == | == Endoskeleton == | ||
In [[vertebrates]], the endoskeleton is sturdy internal frame that is centered on a prominent spine (vertebral column). Most skeletal systems consists of [[bones]], [[cartilage]], [[ligaments]] and [[tendons]] and accounts for a significant portion of the body weight (about 20 percent in humans). The living bones use [[oxygen]] and give off waste products in [[metabolism]]. They contain active tissues that consume [[nutrients]], require a [[blood]] supply and change shape or remodel in response to variations in mechanical stress.[http://training.seer.cancer.gov/module_anatomy/unit3_1_bone_functions.html] | : ''Main Article: [[Human skeleton]]''In [[vertebrates]], the endoskeleton is sturdy internal frame that is centered on a prominent spine (vertebral column). Most skeletal systems consists of [[bones]], [[cartilage]], [[ligaments]] and [[tendons]] and accounts for a significant portion of the body weight (about 20 percent in humans). The living bones use [[oxygen]] and give off waste products in [[metabolism]]. They contain active tissues that consume [[nutrients]], require a [[blood]] supply and change shape or remodel in response to variations in mechanical stress.[http://training.seer.cancer.gov/module_anatomy/unit3_1_bone_functions.html] | ||
=== Main Groups === | === Main Groups === | ||
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* The hinge joint is basically a hinge. It can move up and down or from side to side, but within a 180<sup>o</sup> range. | * The hinge joint is basically a hinge. It can move up and down or from side to side, but within a 180<sup>o</sup> range. | ||
* The ball and socket joint allows for increased range of movement. [http://www.pueblo.gsa.gov/cic_text/health/shoulderqa/shoulderqa.htm] | * The ball and socket joint allows for increased range of movement. [http://www.pueblo.gsa.gov/cic_text/health/shoulderqa/shoulderqa.htm] | ||
* The pivot joint allows for the most movement out of all of the joints. The most common example of this joint is the neck, which can look from side to side, up and down, and almost any way at all. | * The pivot joint allows for the most movement out of all of the joints. The most common example of this joint is the neck, which can look from side to side, up and down, and almost any way at all. | ||
* The glide joint is similar to the ball and socket joint in terms of the range of movement, but there is no actual ball and socket. An excellent example of this is a person's wrist, which has extreme mobility. | * The glide joint is similar to the ball and socket joint in terms of the range of movement, but there is no actual ball and socket. An excellent example of this is a person's wrist, which has extreme mobility. | ||
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==See Also== | ==See Also== | ||
* [[Human skeleton]] | * [[Human skeleton]] | ||
{{Biology navbox}} | {{Biology navbox}} | ||
