Question

Please discuss and describe the major differences between the male and female skeletons, and the reasons for these differences. Focus your discussion especially on the skull and pelvis/pelvic girdle. To receive full credit for this discussion:

Answer 1

Male and female skeletons vary significantly in the pelvis due to differences in reproductive functions. The female pelvis is wider, has a larger subpubic angle for childbirth, and is more shallow than the male pelvis, which is heavier and has a narrower pelvic cavity.

Step-by-step explanation:

Differences Between the Male and Female Skeletons

The major differences between male and female skeletons are primarily found in the pelvis and skull. These differences are adaptations due to sexual dimorphism, particularly evident in the human pelvic girdle, which is influence by the reproductive role of females.

Comparison of the Female and Male Pelvis

• The male pelvis is generally heavier and thicker, adapted to support a more substantial musculature and body build.
• The female pelvis is wider with a larger subpubic angle (greater than 80 degrees), round or oval-shaped pelvic inlet, and a wider, more shallow lesser pelvic cavity. These features accommodate childbirth.

The male pelvic inlet is heart-shaped, and the lesser pelvic cavity is narrower and tapering, with a smaller subpubic angle (less than 70 degrees).

The Pelvic Girdle vs. The Pectoral Girdle

The pelvic girdle serves to bear the weight of the body in comparison to the mobility-oriented pectoral girdle. The former connects the lower limbs to the axial skeleton and supports the weight of the upper body, while the latter attaches the upper limbs and facilitates a range of movements.