Examlex
The first heart sound, "lub," is caused by the closure of the ________ valves.
Coexisted
The act or state of living or existing at the same time or in the same place with another or others.
Neanderthals
An ancient human species distinguished by their survival skills in Ice Age Europe, contributing to the genetic makeup of modern humans through interbreeding.
Homo Sapiens
The scientific name for modern humans, characterized by a high level of cognitive ability, complex language, and the capacity for abstract thought.
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