释义 |
DictionarySeeplaneparallel planes of the pelvis
parallel planes of the pelvisThe planes intersecting the axis of the pelvic canal at right angles. The first plane is that of the superior strait; the second that extending from the middle of the sacral vertebra to the level of the subpubic ligament. The third plane is at the level of the spines of the ischia, and the fourth plane is at the outlet. See also: plane |