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Skeletal system: Difference between revisions
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[[Image:Human skeleton.png|thumb| | [[Image:Human skeleton.png|thumb|300px|Human skeleton showing the axial (blue highlight) and appendicular bones.]] | ||
The '''skeletal system''' is a support and protection structure for [[animals]]. There are two main types of skeletal systems. The endoskeleton is an interal support system of the type possessed by [[humans]] and other [[vertebrates]], which is made of bone. The exoskeleton is an external system that was designed for many invertebrates such as the [[crustaceans]] and [[insects]]. The composition of exoskeletons vary widely, but known constituents include [[calcium]] [[salts]], [[protein]], [[carbohydrates]] ([[chitin]]) and silicate. | The '''skeletal system''' is a support and protection structure for [[animals]]. There are two main types of skeletal systems. The endoskeleton is an interal support system of the type possessed by [[humans]] and other [[vertebrates]], which is made of bone. The exoskeleton is an external system that was designed for many invertebrates such as the [[crustaceans]] and [[insects]]. The composition of exoskeletons vary widely, but known constituents include [[calcium]] [[salts]], [[protein]], [[carbohydrates]] ([[chitin]]) and silicate. | ||
