The genitourinary system - The pelvis Flashcards
What are the two parts of the pelvis?
Identify these on the diagram
The greater pelvis and the lesser pelvis
What is the pelvic cavity continuous with?
The pelvic cavity is continuous superiorly with the abdominal cavity, inferiorly is bounded by two diaphragms (pelvic and urogenital) – acts as supports and sphincters for pelvic viscera.
What is the lesser pelvis continuous with?
The pelvis is completed inferiorly by the urogenital diaphragm and the pelvic floor
What is the superior pelvic aperture?
The border around the greater pelvis
What is the inferior aperture?
the border around the lesser pelvis (flip the pelvis upside down to see this border)
Locate the obturator foramen, the greater and lesser sciatic notch and subpubic angle
On image
What are the 3 bones of the pelvis and locate them?
- Ilium
- Pubis
- Triradiate cartilage cartilage
In adult life what do the pelvic bones do?
In adult life these bones all fuse to form a continuous hip bone. In children cartilage is found between these bones.
What is the Pubic symphysis?
The midline secondary cartilaginous joint uniting the bodies of the left and right pubic bones
Describe the lateral and medial view of the pelvis
Om image
Locate the AIIS and PIIS
On image
How is the pelvis orientated?
The pelvis is tilted anteriorly.
What is the greater pelvis and lesser pelvis separated by?
The greater pelvis is separated from the lesser pelvis by the superior pelvic aperture (pelvic brim/ pelvic inlet.)
Locate the pectinate line, articulate line, alum of the sacrum
On image
Why is the females internal dimensions of the pelvis larger?
The larger internal dimensions allow a larger birth canal.
Which features of the bony pelvis are useful in determining the sex of an individual?
- Subpubic angle in female is much wider
- Width of the greater sciatic notch
- Angle of the sacrum
- Flare of the iliac crests
Locate the kidneys, the ureter and urinary bladder on the model
On image
What is found in the urinary bladder?
The urinary bladder – inside there are ridges called rugae, a triangular segment (trigone) for the ureters and urethra, the uretic openings and prostate
