01 / Location & anatomical relationships
Around the middle of your torso, between the lower ribs and hips.
02 / Structure & organization
The waist is a surface region involving the lateral abdominal walls between the rib cage and pelvis. External and internal oblique muscles and transversus abdominis contribute to its deeper structure. Their fibers run in different directions.
03 / Function
Muscles around it help you bend and turn.
04 / Mechanism
Your waist contains muscles that wrap around the abdomen. They work with back muscles to steady your trunk and control twisting. This support matters even during small movements such as reaching across a table.
Part of a bigger picture
The waist belongs in our torso & skin collection. Explore the nearby parts to see how this area of the body fits together.
Explore torso & skin →FOR DEEPER STUDY
Connect structure with function
Rotation and trunk stabilization recruit several muscles together. The visible waist contour reflects both the underlying skeleton and variable distributions of soft tissue.
Check your understanding
Locate the waist in relation to its neighbors. Explain how the structural features described above support its function, then distinguish it from a nearby structure with a different role.
Keep learning
Continue with OpenStax Anatomy and Physiology for system-level study. This atlas is educational and has not undergone independent medical peer review.