The pelvic (hip) girdle consists of the two hip bones, also called coxal bones.
what are the functions of the pelvic girdle? (3)
The pelvic girdle provides a strong, stable support for the vertebral column, protects the pelvic viscera, and attaches the lower limbs to the axial skeleton.
where are the hip bones united to each other in front? what do they unite with posteriorly and where?
The hip bones are united to each other in front at a joint called the pubic symphysis; posteriorly they unite with the sacrum at the sacroiliac joint.
what do the 2 hip bones of the pelvic girdle form together with the sacrum and coccyx?
Together with the sacrum and coccyx, the two hip bones of the pelvic girdle form a
basinlike structure called the pelvis.
how many parts does each of the 2 hip bones of a newborn are there? name them
Each of the two hip bones of a newborn is composed of three parts the ilium, the pubis, and the ischium.
-describe the ilium.
-what is its upper border called?
-what is on the lower surface? what passes through the greater sciatic notch?
-The ilium (flank) is the largest of the three subdivisions of the hip bone.
-Its upper border is the iliac crest.
-On the lower surface is the greater sciatic notch through which the sciatic nerve, the longest nerve in the body, passes.
what is the ischium?
The ischium is the lower, posterior part of the hip bone
-what is the pubis?
The pubis is the lower, anterior part of the hip bone.
when do the 3 separate bones fuse into one?
By age 23 years, the three separate bones have fused into one.
what is the acetabulum?
The deep fossa (depression) where the three bones meet is the acetabulum. It is the socket for the head of the femur.
what does the ischium join with? what do the ischium and pubis surround? what is the obturator foramen?
The ischium joins with the pubis, and together they surround the obturator foramen, the largest foramen in the skeleton