Question

The cup-shaped structure of pelvic girdle, the acetabulum in man is formed by
A. Ilium, ischium and pubis
B. Ilium, ischium and cotyloid
C. Ilium and ischium
D. Ilium and cotyloid

Answer 1

Hint: A cup-shaped socket that is formed by the union of three bones that makes our hip. This socket joins with the femoral bone to form a femur joint. They help us to walk, run, and move freely. It is a depression in the mid-outer pelvis.

Complete answer: Axial and appendicular are two types of the skeletal system. The axial skeletal system consists of a skull, ribcage, vertebral column, limbs, and girdles. The pelvic girdle is composed of hip bones- ilium, ischium, and pubis.

They are oriented in a ring and it connects the pelvic region of the spine to the lower limbs. The sacrum is the region at the base of the spine. It is a group of specialized vertebrae that helps in joining the vertebral column to the pelvic girdle. The hip bones help in the formation of the cup-shaped structure of the pelvic girdle known as acetabulum. It is the socket of the hip bone into which the head of the femur fits. Lower fused vertebrae help in joining the vertebral column to the pelvic girdle of the human skeleton. It functions to support the body and protect the organs of the pelvis region and the lower back.
Hence, the correct option is (A) Ilium, ischium and pubis.

Note: The pelvic girdle is formed by a single bone that helps in attaching the lower limb to the axial skeleton through articulation with the sacral region. The left and right hip bones along with the sacrum form the pelvic girdle.