**Title: Comparative Analysis of Pelvic Orifices in Male and Female Mammals****Introduction**Explore the similarities and differences in the number and function of openings, or orifices, in the pelvic girdles of male and female mammals. This discussion will highlight both commonalities and distinctions.**Common Features**1. **Urethral Orifice**: Both male and female mammals have a urethral opening, which serves as a channel for urine excretion from the body.2. **Anal Orifice**: Another shared feature is the anal opening, crucial for eliminating solid waste.**Differences**1. **Reproductive Orifices**: - **Females**: Typically possess a distinct vaginal opening, essential for reproductive activities, including mating and birthing. - **Males**: Do not have a vaginal opening. Instead, the urethral orifice is multifunctional, involved in both excretory and reproductive processes.2. **Multiplicity of Orifices**: - In females, there are usually three distinct external openings (urethral, vaginal, and anal), whereas males generally have two (urethral and anal) due to the overlap in function of the urethral opening.By examining these features, we can gain a comprehensive understanding of the anatomical and functional distinctions within the mammalian pelvic structure.

Bones forming pelvis are divided into greater and lesser pelvis.The most remarked difference is due to the adaptation of female pelvis for child bearing. This is the main function of the pelvis, that is to bear the child in the body. Males have stronger muscles, thicker bones and prominent bony markings. As compared to male pelvis, female pelvis shows following differences : 1. False pelvis is deep in male and shallow in female. 2. Pelvic inlet is heart shaped in male due to jutting forward of sacral promontory. In females it is transversely oval. 3. Pelvic cavity is small and deep in male whereas in females it is roomier and shallow. 4. Pelvic outlet is smaller with ischial tuberosities turned inside the male, whereas in female , pelvic outlet is bigger with everted ischial tuberosities. 5. Sacrum is longer and narrow in male, while it is shorter and wider in females. 6. Subpubic angle is narrower that 50-60 degree in male, while in female it is wider, that is 80-85 degree. 7. Greater sciatic notch is wider in females as compared with that of males. 8. Acetabulum is larger in males as compared to females. 9. In females, pelvic part of chilotic line is longer than the sacral part. 10. Preauricular sulcus is more marked in females.