Pelvis And Pelvic Organs Flashcards
Pelvic cavity functions
- Bears wt upper body
- Transfers wt lower limbs
- Muscle attachment
- Contains and protects pelvic viscera and inf abdominal viscera
- Support abdominopelvic viscera
- Erectile body attachement
Os coxae
Fusion ilia, ischia, pubis, and sacrum during puberty
1. Right and left join ant at pubic symphysis
Lesser (true) pelvis
Between pelvic inlet and outlet
- Includes perineal compartment
- Houses reproductive and urinary structures
Greater (false) pelvis
Houses abdominal viscera
Pelvic diaphragm
- Levator ani
2. Coccygeus
Levator ani
Anterolateral wall pelvis
- Fxn: support abdominopelvic viscera and assist in maintaining urinary and fecal continence
- Innervation: S3-S4
- Puborectalis
- Pubococcygeus
- Iliococcygeus
Puborectalis
One of levator ani muscles 1. Fxn: support pelvic viscera 2. Prox: sup pubic ramus 3. Distal: anococcygeal lig 4. Innervation: A. n. to levator ani (S4) B. Inf rectal n. 5. Forms u-shaped sling, maintain fecal continence
Pubococcygeus
One of levator ani muscles 1. Fxn: support pelvic viscera 2. Prox: pubis 3. Distal: anococcygeal lig, coccyx 4. Innervation: A. N. To levator ani (S4) B. Inf rectal n.
Iliococcygeus
One of levator ani m. 1. Fxn: support pelvic viscera 2. Prox: internal obturator fascia of levator ani (tendinous arch) 3. Distal: anococcygeal lig, coccyx 4. Innervation: A. N. To levator ani B. Inf rectal n.
Coccygeus
Part of pelvic diaphragm 1. Fxn: A. Flexes coccyx B. Supports pelvic viscera 2. Prox: A. Lateral surface coccyx B. S5 segment 3. Distal: ischial spine 4. Innervation: S3-S4 branches from sacral plexus
Internal iliac artery
1. Posterior trunk A. Iliolumbar a. B. Lateral sacral a. C. Sup. Gluteal a. 2. Anterior trunk A. Umbilical a. B. Obturator a. C. Inf vesicle/vaginal a. D. Uterine a. E. Middle rectal a. F. Internal pudendal a. G. Inf gluteal a.
Iliolumbar artery
Branch off posterior trunk internal iliac a.
- Lumbar br. - supplies psoas major and quadratus lumborum
- Iliac br. - iliacus and ileum
Lateral sacral artery
Branch off posterior trunk internal iliac a.
- Spinal meninges
- Sacrum
- Skin overlying sacrum
- Erector spinae
Superior gluteal artery
Branch off posterior trunk internal iliac a.
1. Muscle and skin gluteal region
Umbilical artery
Branch off anterior trunk internal iliac a.
1. Superior vesicular a.
A. Sup bladder
B. Distal ureters
Obturator artery
Branch off anterior trunk internal iliac a.
- Pubic branch anastomose w/ contralateral branch and pubic branch IMA
- Accessory branch common
Inferior vesicle/vaginal artery
Branch off anterior trunk internal iliac a.
- Bladder
- Ureters
- Seminal vesicle and prostate
- Posterior surface vagina
Uterine artery
Branch off anterior trunk internal iliac a. 1. Vaginal branch A. Cervix B. Vagina 2. Ascending branch A. Ovarian br. B. Tubal br.
Middle rectal artery
Branch off anterior trunk internal iliac a.
1. Rectum
Internal pudendal artery
Branch off anterior trunk internal iliac a.
- Perineum
- Perineal a.
- Dorsal a. Of penis/clitoris
Inferior gluteal artery
Branch off anterior trunk internal iliac a.
- Skin/muscle gluteal region
- Anastomose w/ vessels around hip jt.
- May arise from posterior trunk internal iliac a.
Ovarian artery
- Ovarian br.
- Tubal br. - uterine tube
- Anastomose w/ branches uterine a.
Medial sacral artery
- Anastomose lateral sacral -> lumbar a.
Superior rectal artery
Continuous w/ IMA -> internal anal sphincter