afferent vs efferent

afferent

noun

  • An afferent structure or connection 

adj

  • Carrying towards. 

efferent

adj

  • Carried outward. 

  • Carrying away from. 

noun

  • A duct or stream that carries away. 

How often have the words afferent and efferent occurred in a corpus of books? (source: Google Ngram Viewer )