Anatomy of the Pelvis
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Questions and Answers

What is the main function of the bony pelvis?

  • Providing attachment for trunk and upper limb muscles
  • Forming the anterior and lateral walls of the pelvic cavity
  • Supporting and protecting the pelvic viscera (correct)
  • Transmitting body weight from the femurs to the vertebral column

    • Which bones form the back wall of the bony pelvis?

  • The symphysis pubis and the sacroiliac joints
  • The sacrum and the coccyx (correct)
  • The anterior superior iliac spines
  • The hip bones

    • How do the two hip bones articulate with each other?

  • Anteriorly at the coccyx, and posteriorly with the sacrum at the symphysis pubis
  • Anteriorly at the sacrum, and posteriorly with the coccyx at the sacroiliac joints
  • Posteriorly at the symphysis pubis, and anteriorly with the coccyx at the sacroiliac joints
  • Anteriorly at the symphysis pubis, and posteriorly with the sacrum at the sacroiliac joints (correct)

    • In the correct orientation of the bony pelvis relative to the trunk, where should the front of the symphysis pubis and the anterior superior iliac spines lie?

    <p>In the same vertical plane</p> Signup and view all the answers

    What forms the pelvic brim posteriorly?

    <p>The sacral promontory</p> Signup and view all the answers

    Which part of the bony pelvis faces upward and backward in the anatomic position?

    <p>The pelvic surface of the symphysis pubis</p> Signup and view all the answers

    What forms part of the abdominal cavity and supports the abdominal contents?

    <p>The false pelvis</p> Signup and view all the answers

    Which structure is bounded by the lumbar vertebrae, the iliac fossae & iliacus muscle, and the lower part of the anterior abdominal wall?

    <p>The false pelvis</p> Signup and view all the answers

    What is the bony canal through which the child passes during birth?

    <p>The true pelvis</p> Signup and view all the answers

    What forms the boundaries behind of the pelvic inlet?

    <p>The sacral promontory</p> Signup and view all the answers

    Which structure is bounded posteriorly by the coccyx, laterally by the ischial tuberosities, and anteriorly by the pubic arch?

    <p>The pelvic outlet</p> Signup and view all the answers

    Which ligaments divide the sciatic notches into greater & lesser sciatic foramina?

    <p>Sacrotuberous ligaments</p> Signup and view all the answers

    What forms part of the perimeter of the pelvic outlet and makes it diamond shaped?

    <p>Sacrotuberous ligaments</p> Signup and view all the answers

    Which part of the pelvis has an inlet, an outlet & a cavity?

    <p>The true pelvis</p> Signup and view all the answers

    What is bounded by the symphysis pubis, the iliopectineal lines, and the sacral promontory?

    <p>The true pelvis</p> Signup and view all the answers

    Which part of the pelvis forms part of the abdominal cavity and supports the gravid uterus?

    <p>The false pelvis</p> Signup and view all the answers

    Study Notes

    Bony Pelvis

    • The main function of the bony pelvis is to support the spine, protect the internal organs, and serve as an attachment site for muscles.
    • The back wall of the bony pelvis is formed by the sacrum and the two auricular surfaces of the hip bones.
    • The two hip bones articulate with each other at the symphysis pubis.
    • In the correct orientation of the bony pelvis relative to the trunk, the front of the symphysis pubis and the anterior superior iliac spines should lie in the same horizontal plane.
    • The pelvic brim is formed posteriorly by the sacral promontory.
    • The sacral surface faces upward and backward in the anatomic position.
    • The pelvic cavity forms part of the abdominal cavity and supports the abdominal contents.
    • The pelvic cavity is bounded by the lumbar vertebrae, the iliac fossae, iliacus muscle, and the lower part of the anterior abdominal wall.
    • The birth canal is the bony canal through which the child passes during birth.
    • The boundaries behind the pelvic inlet are formed by the sacral promontory, the alae of the sacrum, and the posterior superior iliac spines.
    • The perineum is bounded posteriorly by the coccyx, laterally by the ischial tuberosities, and anteriorly by the pubic arch.
    • The sacrospinous and sacrotuberous ligaments divide the sciatic notches into greater and lesser sciatic foramina.
    • The coccyx forms part of the perimeter of the pelvic outlet and makes it diamond-shaped.
    • The pelvis has an inlet, an outlet, and a cavity.
    • The pelvic inlet is bounded by the symphysis pubis, the iliopectineal lines, and the sacral promontory.
    • The pelvic cavity forms part of the abdominal cavity and supports the gravid uterus.

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    Description

    This quiz covers the bony pelvis, its functions, and its role in supporting and protecting pelvic viscera, transmitting body weight, and providing muscle attachment. It also discusses the composition of the bony pelvis, which comprises four bones.

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