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This single-page resource about the sense of smell presents a handful of facts about smell together with scientific illustrations. For example, the resource points out how many odors humans can detect and what scientists still do not know about smell. It also compares our sense of smell to that of rodents. The scientific illustrations are a set of connected, labeled diagrams of the key structures and pathways involved in sensing smell, including the olfactory membrane and olfactory receptors. The resource is part of a feature that explores how humans experience flavor; a similar resource about taste is available. Copyright 2005 Eisenhower National Clearinghouse
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