Details the pelvis (bones and ligaments, boundaries and walls), the perineum (contents of the anterior and posterior perineum), and the structure, location, layers, blood supply, innervation and drainage of the testes and epididymis, the scrotum, the vas deferens and seminal vesicles, the spermatic...
Male genital system
Tuesday, 2 November 2021 10:23 AM
Pelvis
- Bones and ligaments
○ Bony pelvis made of
§ Sacrum
§ Coccyx
§ Pelvic bones
○ 3 pelvic bones on each side
§ Ilium
§ Ischium
□ What you sit on
§ Pubis
○ Pubic symphysis
§ Cartilaginous joint
§ between the two pubic bones
§ Most of these joints in the hip don’t provide
movement but they hold the structures together
○ Sacrococcygeal joint
§ Cartilaginous joint
§ Strengthened by a few ligaments
○ Sacroiliac joints
§ Articulations between the auricular surfaces of the
sacrum and ilium on each side
§ True synovial joints
§ Strengthened by various ligaments
□ Sacrospinous ligament
® Thin triangular ligament
® Sacrum to Ischium spine
□ Sacrotuberous ligament
® Sacrum to the ischium tuberosity
® Also part of boundary of pelvic outlet
□ Forms greater sciatic foramen
® larger
® Separated from the lesser sciatic foramen
via the sacrospinous ligament
□ Lesser sciatic foramen
® Lies inferiorly to the pelvic floor
□ sciatic nerve flows through
- Boundaries
, ® Separated from the lesser sciatic foramen
via the sacrospinous ligament
□ Lesser sciatic foramen
® Lies inferiorly to the pelvic floor
□ sciatic nerve flows through
- Boundaries
○ The pelvic inlet is represented by an imaginary line drawn
from
§ promontory of the sacrum (Posterior)
§ to the superior pole of the pubic symphysis
(anterior)
§ More bony than outlet
□ Since outlet has a posterior surface made from
ligament
○ The pelvic outlet is represented by an imaginary line drawn
from the
§ sacrococcygeal joint to the
§ inferior pole of the pubic symphysis
§ Sacrotuberous ligament
○ transverse diameter of the pelvic inlet
§ marked by the widest distance between the left and
right iliopectineal lines
§ To measure how large pelvic inlet is to determine is
birthing is safe
□ Or do C section
○ The transverse diameter of the pelvic outlet
§ marked by distance between the two ischial
tuberosities
○ Female pelvis
§ Wider pelvic inlet (oval shape)
§ A wider angle between the two inferior pubic rami
§ And more forward tilting
§ Narrowest measurement
□ Promontory of sacrum to superior edge of pubic
symphysis
® True conjugate
§ From promontory of sacrum to inferior edge of pubic
symphysis
□ False conjugate
□ This is the only conjugate that you can measure
manually without x-ray
® During pregnancy check ups
® Then use the value to estimate true
conjugate
- Walls of pelvic cavity
○ Anterior
§ Pubic symphysis and pubic bones
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