Label the bones of the pelvis.
The correct answer and explanation is :
The pelvis is composed of several bones that form a strong bony ring to support the spine and provide attachment for the lower limbs. The main bones of the pelvis include:
1. Ilium
- The ilium is the broad, flaring portion of the hip bone.
- It forms the uppermost and largest part of the pelvis.
- The iliac crest is the curved superior border, commonly referred to as the “hip.”
2. Ischium
- This forms the lower and back part of the hip bone.
- It features the ischial tuberosity, the bony part we sit on.
- It contributes to the formation of the acetabulum, the socket for the femur head.
3. Pubis
- The pubis is the front portion of the pelvic bone.
- It includes the pubic symphysis, a cartilaginous joint that connects the left and right pubic bones.
- The pubic arch helps define the shape of the pelvic outlet.
4. Acetabulum
- A deep, cup-shaped cavity formed by the ilium, ischium, and pubis.
- Serves as the socket for the femoral head, forming the hip joint.
5. Sacrum
- A triangular bone at the base of the spine, consisting of five fused vertebrae.
- It connects the spine to the iliac bones via the sacroiliac joints.
6. Coccyx
- Commonly known as the tailbone.
- Formed of 3–5 fused vertebrae at the very end of the spine.
7. Obturator Foramen
- A large opening created by the ischium and pubis bones.
- Allows nerves and blood vessels to pass through.
These bones work together to support body weight, provide protection to pelvic organs, and allow movement through articulation with the femur. Would you like a labeled diagram with these specific parts shown?