Afferent: Carrying toward. A vein is an afferent vessel because it carries blood from the body toward the heart. The opposite of afferent is efferent. From Brain and Nervous System Resources What Is Myasthenia Gravis?Advice for Living With Myasthenia GravisUnpredictable Days With Myasthenia Gravis Featured Centers What Are the Best PsA Treatments for You?Understanding Biologics 10 Things People With Depression Wish You Knew Health Solutions From Our Sponsors