Fuxianhuia protensa Hou, 1987, is among the most agreed upon representative of the euarthropod stem group. Its placement crownwards of anomalocaridids and bivalved arthropods such as Canadaspis refers ...
Coronary arteries are a vital part of the human heart, providing it with oxygen-rich blood so that it can work. By comparing the hearts of mammals, birds, reptiles, fish and frogs, a ...
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