Final answer:
The iliacus muscle originates on the iliac fossa of the hip bone and inserts on the lesser trochanter of the femur. Its action is to flex the thigh at the hip joint.
Step-by-step explanation:
The iliacus muscle originates on the iliac fossa of the hip bone and inserts on the lesser trochanter of the femur. Its action is to flex the thigh at the hip joint.