Translations:Circulatory system/44/en: Difference between revisions

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Message definition (Circulatory system)
{{multiple image
 | align            = right
 | direction        = vertical
 | width            = 220
 | header            = Circulation in vertebrates
 | header_align      = center
 | header_background =
 | footer            =
 | footer_align      = <!-- left/right/center -->
 | footer_background =
 | background color  =
 | image1            =
 | alt1              =
 | caption1          = {{center|''Fish, amphibians and mammals''}}'''1''': heart{{right|{{bg|#000066|&nbsp; &nbsp;}} venous blood &nbsp;}}<br />'''2''': [[Systemic circulation|systemic]]{{right|{{bg|#FF0000|&nbsp; &nbsp;}} arterial blood &nbsp;&nbsp;}}<br />'''3''': [[Pulmonary circulation|pulmonary]]{{right|{{bg|#00CCFF|&nbsp; &nbsp;}} mixed blood &nbsp; &nbsp;}}
}}
While humans, as well as other [[vertebrates]], have a closed blood circulatory system (meaning that the blood never leaves the network of arteries, veins and capillaries), some [[invertebrate]] groups have an open circulatory system containing a heart but limited blood vessels. The most primitive, [[diploblastic]] animal [[phylum|phyla]] lack circulatory systems.

While humans, as well as other vertebrates, have a closed blood circulatory system (meaning that the blood never leaves the network of arteries, veins and capillaries), some invertebrate groups have an open circulatory system containing a heart but limited blood vessels. The most primitive, diploblastic animal phyla lack circulatory systems.