0 a cup-shaped structure on either side of the pelvis where the hip bone sits:
Prosthetic replacement has been used successfully when the acetabulum has sustained damage.
A ridge extends anteriorly from the lateral side of each acetabulum up to the anterior iliac processes.
Three orientations of muscle fibres (equatorial, meridional, radial) were discernible in the oral sucker, acetabulum and paired lappets.
The posterior process of the ilium is moderately developed and ventrally bears a strong ridge, and the acetabulum is deeply concave.
In fixed cercariae, the acetabulum lies just behind the centre of the body and two eyespots are located in the anterior third between the head organ and the protrusible acetabulum.
The acetabula are shallow, and posterior to them is a prominent tubercle, positioned between the posterior edge of the supraacetabular process and anterior part of the posterior iliac process.
The femur connects at the acetabulum of the pelvis and projects laterally before angling medially and inferiorly to form the knee.
The neck of the femur is generally minimal or absent in the most primitive forms, reflecting a simple attachment to the acetabulum.
Both hip resurfacing and hip replacement require that a cup is placed in the acetabulum of the hip socket.
