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== Circulatory system == | == Circulatory system == | ||
: ''Main Article: [[Circulatory system]]'' | : ''Main Article: [[Circulatory system]]'' | ||
The Circulatory system helps maintain [[homeostasis]]. It delivers gases, helps with the regulation of [[temperature]], and the transport of [[nutrition]] and waste.<ref name=wikipedia>[http://en.wikipedia.org/wiki/Circulatory_system Circulatory system] by Wikipedia</ref> | The Circulatory system helps maintain [[homeostasis]]. It delivers gases, helps with the regulation of [[temperature]], and the transport of [[nutrition]] and waste.<ref name=wikipedia>[http://en.wikipedia.org/wiki/Circulatory_system Circulatory system] by Wikipedia</ref> It consists of heart, blood, and blood vessels. Another name of the circulatory system is a cardiovascular system. There are two different types of the circulatory system: open circulatory system and closed circulatory system.<ref>Purves, William. Life the Science of Biology. 2005. Couriers Company Inc. p 941.</ref> Most of vertebrates have a closed circulatory system and most of the invertebrate have an open circulatory system.<ref name=wikipedia /> | ||
== Digestive system == | == Digestive system == |