Bones of the Pelvis - Human Anatomy | Kenhub

Summary

In this video, Matt from Kenhub provides an in-depth overview of the human pelvis, highlighting its four bones: the hip bones, sacrum, and coccyx. He explains the structure of the pelvis, detailing how the hip bones fuse and function to support the weight of the upper body while allowing balance. The video also touches on the differences in male and female pelvises, emphasizing the broader shape in women for childbirth. The content is educational, presenting the anatomical features of the pelvis in an engaging, easily digestible format with an invitation to explore more learning tools on Kenhub.

Takeaways

• 😀 The pelvis is formed by four bones: a pair of hip bones (innominate bones), the sacrum, and the coccyx.
• 😀 The pelvic girdle consists of the hip bones and sacrum, and its function is to transmit weight from the upper body to the lower limbs.
• 😀 The ilium, ischium, and pubis are the three bones that form the hip bone and fuse at puberty to form the innominate bones.
• 😀 The sacrum has five main parts: the superior articular process, wing of the sacrum, base of the sacrum, pelvic surface of the sacrum, and apex.
• 😀 The coccyx consists of four fused vertebrae and a single terminal vertebra.
• 😀 Pelvic structure varies between males and females due to functional and developmental reasons.
• 😀 The pelvis is generally heavier in males and has more muscle attachments, with a narrower pubic arch, subpubic angle, and pelvic outlet.
• 😀 Women's ilia are more flared than men's, which makes their greater pelvis more shallow to accommodate childbirth.
• 😀 The broader pelvis in women provides more space for the fetus to exit during childbirth.
• 😀 The structure of the pelvis is adapted to support different functions in males and females, with males having a more robust frame and females designed for childbirth.

Q & A

What are the four bones that make up the pelvis?

The pelvis is formed by four bones: a pair of hip bones (innominate bones), the sacrum, and the coccyx.

What is the function of the pelvic girdle?

The pelvic girdle, consisting of the hip bones and the sacrum, transmits the weight from the upper body to the lower limbs and helps maintain balance.

Which bones form the hip bone and how do they develop?

The hip bone is formed by the ilium, ischium, and pubis. These bones fuse together during puberty to form the innominate bones and are joined by cartilage in the acetabulum.

What are the major parts of the sacrum?

The sacrum has the following parts: the superior articular process, the wing of the sacrum, the base of the sacrum, the pelvic surface of the sacrum, and the apex.

What is the structure of the coccyx?

The coccyx consists of four fused vertebrae and a single terminal vertebra.

How does the structure of the pelvis differ between males and females?

The structure of the pelvis differs between males and females for functional and developmental reasons. In males, the pelvis is heavier, with more muscle attachment, a narrower pubic arch, and a smaller pelvic outlet. In females, the pelvis is broader to provide space for childbirth.

Why is the female pelvis broader than the male pelvis?

The female pelvis is broader to accommodate the fetus during pregnancy and facilitate childbirth.

What makes the female pelvis different from the male pelvis in terms of muscle attachment?

The male pelvis is heavier and has more muscle attachment points, while the female pelvis is designed for childbirth, making it wider and more shallow.

What role does the flaring of the ilia play in the female pelvis?

The ilia in females are more flared, which makes their greater pelvis more shallow and provides additional space for childbirth.

What are the benefits of using Kenhub for anatomy learning?

Kenhub offers videos, interactive quizzes, articles, and an anatomy atlas that provide a fun and engaging way to learn about human anatomy, replacing traditional textbooks.