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Biological system: Difference between revisions
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→Skeletal system
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== Skeletal system == | == Skeletal system == | ||
: ''Main Article: [[Skeletal system]]'' | : ''Main Article: [[Skeletal system]]'' | ||
The '''skeletal system''' provides support and protection 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. | |||
== References == | == References == | ||
