What is the Difference Between Pelvis and Hip?

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The pelvis and hip are two different but interconnected skeletal structures located in the lower part of the human body. They serve crucial roles in providing support, stability, and mobility. Here are the main differences between the pelvis and hip:

  • Pelvis: The pelvis is a large bony structure composed of three fused bones: the ilium, ischium, and pubis. It serves as a ring-like structure that connects the vertebral column to the lower extremities, transmitting body weight from the axial skeleton to the legs. The pelvis is also responsible for accommodating the birth canal in female individuals, making it larger and wider compared to the male pelvis.
  • Hip: The hip joint is a ball-and-socket joint located between the head of the femur and the acetabulum of the pelvis on each side. It connects the trunk to the lower extremities and supports dynamic and static body weight. The hip joint is one of the largest joints in the body and offers a wide range of motion, providing support for the legs to hold the upper body weight.

In summary, the pelvis is a large bony structure that connects the spinal column and legs, while the hip joint is a ball-and-socket joint that connects the pelvis and femur, transferring the upper body weight from the pelvis to the legs.

Comparative Table: Pelvis vs Hip

The pelvis and hip are two distinct parts of the human body, and they have different structures and functions. Here is a table highlighting the differences between them:

Feature Pelvis Hip
Definition The pelvis is a basin-shaped structure that supports the spinal column and serves as the attachment point for the lower limbs. The hip refers to the joint where the femur (thigh bone) connects to the pelvis, specifically the acetabulum, a deep cup-shaped cavity on the lateral side of the hip bone.
Bones Comprised of the ilium, ischium, and pubis. Comprised of the femur (thigh bone) and the hip bone (coxal bone).
Size and Shape The pelvis is larger and broader in females, while it is taller, narrower, and more compact in males. The female pelvis is adapted for childbirth, with a wider and rounder pelvic inlet. The hip bone and femur have similar dimensions in both sexes.
Function The pelvis provides a strong foundation for the upper body, enables the weight of the body to be easily transferred through the pelvic girdle and hip joints, and supports locomotion. The hip joint allows movement and rotation of the lower limb.

In summary, the pelvis is a basin-shaped structure that supports the spinal column and serves as the attachment point for the lower limbs, while the hip is a joint where the femur connects to the pelvis. The pelvis is larger and broader in females, adapted for childbirth, while the hip has similar dimensions in both sexes.