Composition of the pelvis - pelvic bone structure - male and female pelvis model

The pelvis refers to the pelvic skeleton connecting the spine and the lower limbs. The pelvis is a complete bone ring connected by the rear sacrum, the coccyx (the lowest two bones of the spine) and the left and right hip bones. The pelvis not only transmits the body weight to the two lower limbs , and as the basis for the activities of free lower limbs, but also support the protection of abdominal and pelvic organs.

The sacrum, ilium, and between the sacrum and the coccyx are supported by strong ligaments to form joints, and generally cannot move. After pregnancy, under the influence of hormones, the ligaments are slightly relaxed, and the joints are slightly loosened, which is beneficial to childbirth.
The entire pelvis is divided into a large upper pelvis (false pelvis) and a lower small pelvis (true pelvis) by the boundary line. The boundary line is the circular line surrounded by the sacral promontory, the anterior border of the sacral wings on both sides, the arcuate line on both sides, the pubic comb, the pubic tubercle, the pubic ridge, and the upper border of the pubic symphysis, that is, the small upper pelvic mouth, the large, The small pelvis communicates with this mouth. The lower mouth of the pelvis is uneven in height and is composed of the tip of the coccyx and the sacrotuberous ligaments on both sides, the ischial tuberosity, the pubic arch, and the lower border of the pubic symphysis, which is rhombus-shaped. The part between the upper mouth and the lower mouth is the pelvic cavity.
When medical colleges explain the pelvic bone structure of the human body, they usually use male and female pelvic models as an intuitive teaching aid for comparative teaching, so that students can more intuitively understand the similarities and differences between male and female pelvic bone structures.
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