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Scoop.it!
The human heart is a pump made primarily of cardiac muscle that constantly circulates blood throughout the human body. By so doing, the human heart provides nutrients and oxygen to organs, including itself. 
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Scoop.it!
Micro-CT study of the female of an aquatic beetle (Insect: Coleoptera) of the genus Dryops. Scanned with a Skyscan-1172 microtomograph at the Dept. of Zoology, Univ. of Granada. Spain, by Prof.D Via Sakis Koukouvis
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Know all about the characteristics and key facts about the human heart. Includes illustrations and downloadable files for practice.