CHAPTER 9

• What are the two hip bones also called?

  Coxal bones or os coxa

  
• What is the primary function of the pelvic girdle?

  Support for vertebral column and organs

  
• How many bones make up each hip bone?

  Three bones

  
• What are the three bones that comprise each hip bone?

  Ilium, pubis, ischium

  
• Where is the ilium located in relation to the other bones?

  At superior position

  
• Where is the pubis located?

  Inferior and anterior

  
• Where is the ischium located?

  Inferior and posterior

  
• How do the hip bones unite?

  At pubic symphysis and sacroiliac joints

  
• What is the largest component of the hip bone?

  The ilium

  
• What does the body of the ilium help form?

  The acetabulum
• What is the obturator foramen?

  Largest foramen in the skeleton

  
• What passes through the obturator foramen?

  Blood vessels and nerves
• What is the role of the hormone relaxin during pregnancy?

  Increases flexibility of pubic symphysis
• What forms the pubic arch?

  Inferior rami of pubis

  
• What is the function of the acetabulum?

  Socket for head of femur

  
• What is the pelvic brim?

  Boundary dividing pelvis into parts

  
• What is the false pelvis?


  Portion above the pelvic brim

  
• What is the true pelvis?

  Portion below the pelvic brim

  
• What is the pelvic outlet?

  Inferior opening of true pelvis

  
• What is the pelvic inlet?

  Superior opening bordered by brim
• What is the pelvic axis?

  Imaginary line through true pelvis

  
• How do male and female pelvises differ structurally?

  Males are larger; females are wider

  
• Why is the female pelvis wider and shallower?

  To accommodate childbirth requirements
• What adaptations are seen in female pelvises for childbirth?

  More space in true pelvis
• What separates the three bones in each hip bone?

  Triradiate cartilage

  
• What is the significance of the acetabular notch?

  Passage for vessels and ligaments
• What is the role of the obturator membrane?

  Closes the obturator foramen
• Why is the pelvic axis important during delivery?

  It guides the baby's head