Exam 2: Lecture 11 and 12 Flashcards
What are the bones of the pelvis?
Pelvic bones (2), Sacrum, Coccyx
What 3 fused bones make up the pelvis?
Ilium, Ischium, Pubis
What is the role of the acetabulum of the pelvic bone?
Cup-shaped depression on the lateral surface is the acetabulum – attachment site for femur bone
What is the pubic symphysis?
fibrous joint of where 2 pelvic bones meet anteriorly
What is the role of the ischial spine?
separates the Lesser and great sciatic notch
What part of the pelvic bone do we sit on?
Pubic Tuberosisty
What is the obturator foramen?
Closed off by membrane, and obturator nerve and veins pass through to innervate and supply medial thigh
What nerve innervated the anterior thigh?
femur nerve
What surrounds the obturator foramen?
pubic rami
What is the purpose of the pubic tubercle?
bump on pubis that is the attachment of the inguinal ligament
What parts of the pelvic bones are on the same plane?
The pelvis is tilted anteriorly so that the ASIS and pubic tubercles are in the same vertical plane
What connects the bones of the pelvis with each other?
Anteriorly, they are connected at the pubic symphysis by dense fibrocartilage
What is the role of the pubic tubercle?
bump on pubis that is the attachment of the inguinal ligament
What is the sacro-iliac joint?
where two pelvic bones are connected to the sacrum
What is the role of the ischial spine?
separates the Lesser and great sciatic notch
What is the gender differenced of the pubis?
Men have smaller pubic angle, and women have larger/circular pelvic inlet
What is the role of the inguinal ligament?
Thickening of the external oblique of the abdominal canal that Connects anterior superior iliac spine (ASIS) to the pubic tubercle
What is the pubic angle?
The angle formed by the two pubic bones (pubic arch) anteriorly is the pubic angle
What is the role of the pelvic inlet?
Separates true and false pelvis; true pelvic cavity and abdomen (above is false of the abdominal region and below inlet is true)
What is the role of the pubic rami?
superior and ischial (inferior) ramus surround the obturator foramen
What does the pubic brim separate?
the pelvic inlet
What is the linea terminalis of the pelvis?
ridges on the pelvis
What part of the pelvis is the false/greater pelvis?
above the pelvic inlet, surrounded by wings of the ilium
What is contained in the false pelvis?
Contains digestive organs and is Part of abdominal cavity
What part of the pelvis is the true/lesser pelvis?
below the pelvic inlet and has pelvic outlet and Part of pelvic cavity
What is the role of the pelvic floor muscles?
to keep organs of the pelvis from falling out
How is the pelvic inlet formed?
imaginary plane formed by bony ridges
What is the role of the sacrospinous and sacrotuberous ligaments?
Stabilize pelvic bones/sacrum and prevent upward displacement, and Convert the greater and lesser sciatic notches into foramina (opening)
What is the role of the obturator internus muscles?
Deep gluteal muscle that border pelvis and attaches to femus to move the femur
What is the piriformis muscle?
Deep gluteal muscle that originates on sacrum and move out into pelvic cavity through the lesser sciatic notch to attach to the femur
Where is the point of attachment?
attaches to sacral tuberosity
What is the passageway of the sacrospinous ligament?
crosses sacrotuberous ligament in T-shape and runs from sacrum to the ischial spine
What muscles composed the pelvic floor muscles?
Composed of pelvic diaphragm muscles (levator ani - larger and coccygeal muscle - smaller and in the back)
What is the levator ani muscles?
Sling-like muscle with multiple parts (Kegels)
Extends from coccyx (as anococcygeal ligament) to the pubic bone -Has anal aperture for anal canal and anterior opening (urogenital hiatus) for opening of urethra (+/- vagina)
What is the urogenital hiatus located?
opening for urethra
What is the function of the pelvic diaphragm?
Supports pelvic organs and sphincters of passing through organs and Rectal flexion
What is the post posterior aspect of the pelvis?
rectum
What 2 spinchters control the anal canal?
Internal anal sphincter (smooth muscle, controlled by ANS involuntary) and external anal sphincter (skeletal muscle, controlled by Somatic Volunatry - pudendial nerve)
What nerve controlls the external anal spinchter?
pudendial nerve
What sympathetics control the anal canal below the pectinate muscle?
somatic control from pudendal nerve
What is the portal-caval anastomoses?
one part of anal canal is drained by portal vein and the other goes straight to IVC
What is the blood supply above the pectinate line?
lymphatics goes above internal and below external
What is the blood supply below the pectinate line?
get its supply from middle and inferior rectal anal artery
What is the blood supply to the rectum?
superior rectal artery from the IMA
What is the most anterior structure in the pelvis?
urinary bladder
What is the median umbilical ligament?
fetal remnant between the bladder and ureter that has no real function, but when its not closed off at birth, the baby can leak urine from its belly button
What is the path of the testes?
gonads (develop from abdomen and descend down) sit within the scrotum and produce sperm cells that travel through the epididymis within the scrotum back into the pelvic cavity into ductus defrens which connects spermatic cord to the urethra
What are the capsule layers covers the testes?
covered by capsule (tunica albuginea) and anterior sac of peritoneum (tunica vaginalis) within scrotum
Where is sperm produced?
Seminiferous tubules
Where is sperm mobilized?
epididymis
How is the inguinal canal formed?
Testes pass through abdominal canal, grabbing all the layers of the anterior abdominal wall, forming the inguinal canal
What is the role of the venous plexus in the male reproductive tract?
to drain the testes
Where does the testicular artery drain?
drain into IVC into the right, and into the Left Renal vein on the left
What nerve controls the cremaster muscle?
Gentinofemoral nerve
How does the vas defrens enter the pelvic cavity?
via the inguinal canal
What parts of the male reproductive tract contribute to fluid secretion for ejaculation?
ejaculatory ducts, cowper’s glands and the prostate
What is the path of the ejaculatory ducts?
Ejaculatory ducts pass through the prostate to join the prostatic urethra
Where is the Cowper’s glands located?
Bulbourethral glands (Cowper’s glands) is located underneath prostate in deep perineal pouch and secrete lubricant and pre-ejaculate into penile urethra
What is the vital role of the internal urethra spincter?
internal spinchter is under ANS control and constricts during urination so ejaculation doesn’t happen at the same time (sperm doesn’t enter the bladder and urine in the ejaculator duct
How is the ovary attached to the uterus?
ovarian ligament