US301-Sonographic Exploration

Discussion 6

What structures does the pelvis hold?

the lower gastrointestinal tract, lower urinary tract, reproductive organs

What four bones make up the pelvis?

1 sacrum, 1 coccyx, 2 innominate bones

What three bones fuse together to form each innominate bone?

ilium, pubis, ischium

What are the two anatomical divisions of the pelvis?

true pelvis and false pelvis

What structures are in the false pelvis?

upper part of the rectum and sigmoid colon

What structures are in the true pelvis?

urinary bladder, ureters, ovaries, fallopian tubes, uterus, vagina, prostate, rectum, colon, ileum

What are the two triangles of the perineum?

the anal triangle and the urogenital triangle

What is the typical capacity of the urinary bladder before the urge to urinate is triggered?

approximately 200 to 250 mL

How long is the female urethra?

approximately 3-4 cm

What is the length of the rectum?

approximately 15 cm

What are the principal organs of the female reproductive system?

uterus, ovaries, uterine tubes, vagina

What is the shape and location of the uterus?

pear-shaped; in the pelvic cavity between the bladder and rectum

What is the typical size of a non-pregnant uterus?

approximately 7-8 cm long and 5 cm wide

What are the anatomical parts of the uterus?

fundus, body, cervix

What are the ligaments that support the uterus?

The broad ligament, round ligaments, cardinal ligaments, ovarian ligaments, suspensory ligaments, and uterosacral ligaments

What are the four portions of the round ligaments?

infundibulum, ampulla, isthmus, interstitial portion

What happens in the ampulla of the fallopian tubes?

fertilization

What is the size of the ovaries?

approximately 3-4 cm in length

What are the structures of the male reproductive system?

testes, ducts, accessory sex glands, scrotum, penis

What are the main muscles of the pelvic diaphragm?

Levator ani (pubococcygeus, puborectalis, iliococcygeus) and coccygeus muscles