Is the coccyx part of the os coxae?
Together, the right and left os coxae form the pelvic girdle. Together, the pelvic girdle, sacrum, and coccyx (final 3-5 vertebrae) make up a ring of bones called the pelvis (bony pelvis).
What bones form the os coxae?
In discussing the pelvis, a distinction can be made between the “pelvic spine” and the “pelvic girdle.” The pelvic girdle, also known as the os coxae, Latin for “bone of the hip,” consists of the fused bones identified individually as the ilium, ischium, and pubis.
What is the sacrum and coccyx called?
The sacrum, sometimes called the sacral vertebra or sacral spine (S1), is a large, flat triangular shaped bone nested between the hip bones and positioned below the last lumbar vertebra (L5). The coccyx, commonly known as the tailbone, is below the sacrum.
Which part of the os coxae articulates with the sacrum?
The ilium is where the sacrum attaches to each coxal bone to complete the pelvic bowl. This attachment point is alternatively called the sacroiliac joint, the sacroiliac articulation, or the iliac tuberosity, and is a rough surface.
Is the os coxae part of the axial skeleton?
The pelvic girdle is formed by the paired os coxae (coxal bones). Together with the sacrum and coccyx of the axial skeleton, this group of bones forms the bony pelvis.
Is there an intervertebral disc between sacrum and coccyx?
The vertebral column is formed by articulation of individual vertebrae. The intervertebral discs are usually absent in the sacrum and coccyx due to the fusion of these vertebrae.
Which of the following bones is not part of the os coxae?
The two coxal bones articulate with the sacrum at the sacroiliac joints to create the pelvic girdle. The femur is the large bone located in the upper leg. The head of the femur merely articulates with the acetabulum of the hip bone to form the hip joint and is therefore not a coxal bone.
What does the os coxae articulate with?
In the adult, the pelvis (os coxae) is formed by the fusion of three bones: ilium, ischium, and pubis (Figure 6-1A and B). The union of these three bones occurs at the acetabulum. The paired os coxae articulate posteriorly with the sacrum and anteriorly with the pubic symphysis.
Is coccyx and sacrum the same?
The sacrum forms the posterior pelvic wall and strengthens and stabilizes the pelvis. Joined at the very end of the sacrum are two to four tiny, partially fused vertebrae known as the coccyx or “tail bone”.
Why are the sacrum and the coccyx different from the other vertebral divisions?
During childhood the five vertebrae of the sacral region are distinct. The sacrum functions to support the body and protect organs of the pelvis and lower back. The final region of the spine is the coccyx, or tailbone. As with the sacrum, the coccyx is formed from several vertebrae that have fused together.
What part of the os coxae does the femur articulate with?
Acetabulum
Acetabulum. A cup-shaped socket into which the ball-shaped head of the femur articulates.
What part of the os coxae does the femur articulate with in the hip region?
The acetabulum is the cup-shaped socket on the lateral aspect of the pelvis, which articulates with the head of the femur to form the hip joint. The margin of the acetabulum is deficient inferiorly.