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In human anatomy, the pelvis (plural pelvises) is either the lower part of the trunk,〔Moore (1992), pp 357-358〕 between the abdomen and the thighs (sometimes also called pelvic region of the trunk) or the skeleton embedded in it〔(Gray's anatomy )〕 (sometimes also called bony pelvis, or pelvic skeleton). The pelvic region of the trunk includes the bony pelvis, the pelvic cavity (the space enclosed by the bony pelvis), the pelvic floor, below the pelvic cavity, and the perineum, below the pelvic floor.〔 The pelvic skeleton is formed in the area of the back, by the sacrum and the coccyx and anteriorly and to the left and right sides, by a pair of hip bones. The two hip bones connect the spine with the lower limbs. They are attached to the sacrum posteriorly, connected to each other anteriorly, and joined with the two femurs at the hip joints. The gap enclosed by the bony pelvis, called the pelvic cavity, is the section of the body underneath the abdomen and mainly consists of the reproductive organs (sex organs) and the rectum. In mammals, the bony pelvis has a gap in the middle, significantly larger in females than in males. Babies pass through this gap when they are born. ==Structure== The pelvic region of the trunk is the lower part of the trunk, between the abdomen and the thighs.〔 It includes several structures:〔 * the bony pelvis (or pelvic skeleton), which is the part of the skeleton embedded in the pelvic region of the trunk, subdivided into: * * the pelvic girdle (i.e., the two hip bones, which are part of the appendicular skeleton), which connects the spine to the lower limbs, and * * the pelvic region of the spine (i.e., sacrum, and coccyx, which are part of the axial skeleton) * the pelvic cavity, typically defined as a small part of the space enclosed by the bony pelvis, delimited by the pelvic brim above and the pelvic floor below; alternatively, the pelvic cavity is sometimes also defined as the whole space enclosed by the pelvic skeleton, subdivided into: * * the greater (or false) pelvis, above the pelvic brim * * the lesser (or true) pelvis, below the pelvic brim * the pelvic floor (or pelvic diaphragm), below the pelvic cavity * the perineum, below the pelvic floor 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「pelvis」の詳細全文を読む スポンサード リンク
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