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The acetabular fossa is the non-articular depressed region at the centre of the floor of the acetabulum.It is surrounded by the articular lunate surface. [1]: 1368 [2] The floor of the fossa is formed mostly by the ischium; [2] it is rough [1]: 1354 and thin (often to the point of transparency).
It forms an incomplete ring that is deficient inferiorly - opposite the acetabular notch. The lunate surface surrounds the central, non-articular depression - the acetabular fossa - which does not make contact with the femoral head in the articulated hip joint. [1] Its surface consists of articular cartilage.
At the lower part of the acetabulum is the acetabular notch, which is continuous with a circular depression, the acetabular fossa, at the bottom of the cavity of the acetabulum. The rest of the acetabulum is formed by a curved, crescent-moon shaped surface, the lunate surface, where the joint is made with the head of the femur.
The acetabular notch is a deep [citation needed] notch in the inferior portion of the rim of the acetabulum. [ 1 ] : 1354 It is bridged by the transverse acetabular ligament , converting it into a foramen (through which nerves and vessels (including the acetabular notch of obturator artery [ 1 ] : 1250 ) pass into the hip joint cavity).
In anatomy, a fossa (/ ... Trochanteric fossa; Acetabular fossa; Popliteal fossa; Intercondyloid fossa. Anterior intercondyloid fossa; Posterior intercondyloid fossa;
Fossa/ilioischial relationship: In normal conditions the floor of the acetabular fossa is lateral to the ilioischial line by 2 mm in men and 1 mm in women. When the acetabular floor overlaps or overpasses the ilioischial line, the diagnosis of coxa profunda can be made.
Acetabulum of leech towards the right. In leeches, acetabulum refers to the prominent posterior sucker at the extreme end of the body. In fact it forms a head-like structure, while the actual head is relatively small. It is a thick disc-shaped muscular system composed of circular, longitudinal and radial fibers. [4]
Bird anatomy, or the physiological structure of birds' bodies, shows many unique adaptations, mostly aiding flight.Birds have a light skeletal system and light but powerful musculature which, along with circulatory and respiratory systems capable of very high metabolic rates and oxygen supply, permit the bird to fly.