What Human Body Parts Start With the Letter R?

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A number of human body parts have names that begin with the letter r, including ribs, retina and radius. Some have formal, scientific names that begin with that letter, such as retina, while others, like ring finger, are informal terms.

The human body contains a veritable alphabet of parts; some of which have Latin or scientific names that begin with the letter r, and some of which begin with that letter but are more colloquial terms referring to the side of the body on which they are located.

Informal body part names include:

  • Ribs
  • Rib cage
  • Right leg
  • Ring finger
  • Rotator cuff

Formal terms for body parts that begin with r include:

  • Radius
  • Rectum
  • Rectus abdominis (lower abdominal muscles)
  • Rectus capitis (back muscle)
  • Rectus femoris (front leg muscle)
  • Retina
  • Rotatores spinae (muscles)

There are also two anatomical systems that start with r: the reproductive system and the respiratory system. Although they are not individual parts, they perform critical functions in the human body.