anatomy

• Grey matter

  The part of the brain responsible for higher cognitive functions, often used metaphorically to refer to intelligence itself.

• Have the guts

  To possess the courage or bravery required to do something challenging or frightening.

• Bare bones

  The most basic, essential, and fundamental parts of something, devoid of any embellishment or additional features.

• To warm the cockles of one's heart

  To make someone feel genuinely happy, deeply content, and often nostalgic.

• Skeletal

  Pertaining to the fundamental framework or essential bare bones of something, often implying a severe lack of detail or substance.