Question

multiple choice question

which of the following male body structures is less movable than that of a female?

coccyx
sacrum
skull
femur

Explanation:

Analyze skeletal differences between sexes

Using the Pelvic Sexual Dimorphism and Male Pelvis Anatomy knowledge points

• The female pelvis is adapted for childbirth, requiring a wider and more flexible birth canal.
• The female coccyx is more movable and tilts posteriorly during parturition to increase the pelvic outlet.
• In males, the coccyx is less movable, more rigid, and curves more anteriorly into the pelvic cavity.

Evaluate the given options

Using the Pelvic Sexual Dimorphism knowledge point

• Coccyx: Less movable in males than in females to accommodate childbirth in females.
• Sacrum: While shaped differently (narrower and more curved in males), mobility differences primarily affect the coccyx.
• Skull: Immovable fibrous joints (sutures) in both sexes.
• Femur: Synovial joint mobility at the hip is comparable, not structurally restricted by sex in this manner.

Answer:

• Coccyx (Correct answer)
• Sacrum
• Skull
• Femur