Which anatomical term refers to the underarm region?

• A. Armpit
• B. Underarm
• C. Axilla
• D. Axillary region

Answer: (C)

In anatomy, the underarm is called the axilla. The axilla is the pyramid-shaped space that connects the arm to the thorax and houses important structures like lymph nodes and blood vessels. While armpit and underarm are the everyday terms people use, axilla is the precise anatomical name used in medical and esthetic contexts. The phrase axillary region may appear in descriptions, but the space itself is defined as the axilla. Understanding this term helps you accurately communicate location and relate it to nearby structures involved in lymph drainage, nerves, and vessels during treatments.