Do humans have a tenderloin?

The iliopsoas deep inside the pelvis is the bending muscle of the hip joint and the tenderloin of the human body. It consists of two muscles that emerge from the sides of the spine and the inside of the pelvis and are attached to the thigh bones.

ILIOPSOAS

WHERE: The pelvis, spine, and thighbone.

WHAT: The muscle makes the hip bend and the back sway, keeping the body balanced relative to the legs.