Pelvic Cavity Flashcards

1
Q

The anal canal is enclosed by what 2 sphincters?

A
  • External anal sphincter - Internal anal sphincter
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2
Q

What is the name of the folds within the rectum?

A

Transverse rectal folds

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3
Q

The rectum is enclosed by what two junctions?

A
  • rectosigmoid junction
  • anorectal junction
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4
Q

Arteries of the rectum

A
  • Superior rectal a
  • Internal iliac a: middle rectal; internal pudendal a.
  • Inferior rectal a. (Off of internal pudendal a.)
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5
Q

What artery supplies the anorectal junction and anal canal?

A

Inferior rectal a. off of the internal pudendal a. off of the internal iliac a.

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6
Q

Superior rectal v (drain IMV->Poral system) forms a portal caval anastomosis with what plexus?

A

External and internal rectal venous plexus: supplied by internal iliac-> middle rectal vein, internal pudendtal v -> inferior rectal vein

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7
Q

Sympathetics of the rectum

A

Lumbar splanchnic nn.

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8
Q

Parasympathetics of the rectum?

A

pelvic splanchnic nn (S2-4)

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9
Q

Visceral pain of rectum

A

Below pain line: follow parasympathetic pathway (pelvic splanchnic nn. S2-4)

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10
Q

Blood supply to ureters

A

Multiple branches from renal a.; gonadal a.; internal iliac a.

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11
Q

Where does the bladder lie in adults? in Infants/young children?

A

Adults: within the pelvic cavity

Infants/youn children: Abdomen

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12
Q

What fascia surround the bladder?

A

endopelvic fascia

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13
Q

What ligament connect the urethra from the bladder to the levator ani muscles

A

lateral ligament of bladder

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14
Q

What is the base/posterior surface of the bladder called

A

Fundus

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15
Q

Apex of the bladder has what ligament attached to it?

A

Median umbilical ligament

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16
Q

The areas where the ureters enter the bladder are referred to as?

A

ureteric orifices

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17
Q

The area where the urethra exits the bladder is referred to as ?

A

internal urethral orifice

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18
Q

What is the triangular space created by the ureteric orifices and urethra in the bladder?

A

Trigone

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19
Q

What muscle surrounds the bladder?

A

Detrusor m

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20
Q

Sympathetic innervation of the bladder

A

lumbar splanchnic nn

Purpose:

  • maintain tonic contraction to allow filling
  • contract internal sphincter during ejaculation
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21
Q

What is the importance of the visceral reflexive afferents of the bladder?

A

detect fullness of bladder

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22
Q

Parasympathetics of bladder; purpose?

A

Pelvic splanchnic nerves (S2-4)

Purpose

  • motor to contract detrusor m.
  • Inhibit internal urethral sphincter
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23
Q

Visceral afferent: Pain of bladder

A
  • Portions above pain line (intraperitoneal): follow sympathetic pathway
  • Portions below pain line (subperitoneal): Follow parasympathetic pathway
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24
Q

Arteries of the bladder

A
  • Umbilical a
  • Superior vesical aa.
  • Inferior vesical a.
  • Prostatic branch (in male)
25
Q

Is the distance between the internal urethral orifice and external urethral orifice longer in males or females?

A

Longer in males

26
Q

Identify a and b

A

a. Ovary
b. Ovarian Ligament

27
Q

Identify c and d

A

c. Fimbriae
d. Fallopian tube

28
Q

Identify e and f

A

e. suspensory ligament of ovary
f. broad ligament

29
Q

The broad ligament of the uterus contains what 3 parts?

A
  • Mesosalpinx
  • Mesovarium
  • Mesometrium
30
Q

Uterus is composed of what three tissue layers?

A
  1. Perimetrium (superificial)
  2. Myometrium
  3. Endometrium
31
Q

What is the point where the uterus and fallopian tubes meet?

A

Uterine horn

32
Q

What is the superior portion of the uterus called?

A

Fundus of uterus

33
Q

What is the name for the divide between the body of the uterus and the cervix?

A

Isthmus

34
Q

Name the proximal and distal narrowing area of the cervical canal

A

Internal os: between uterus and cervix

External os: between cervix and vagina

35
Q

Identify 6 and 7

A

6: Anterior vaginal fornix
7: Posterior vaginal fornix

36
Q

What area lies between labia minora at the entrance to the vagina?

A

Vestibule of vagina

37
Q

What is a culdocentesis

A

inserting a needle through the posterior vaginal fornix and into the rectouterine pouch

38
Q

Uterine blood supply

A
  • Ovarian a.
  • Uterine a.
  • Vaginal a.
  • Internal pudendal a.

* Hysterectomy: all arteries must be ligated

39
Q

Innervation: Ovaries and Uterine tubes

A

Sympathetic: lumbar splanchnic nn.

Parasympathetic: pelvic splanchnic nn.

Pain: aobe pain line: follows sympathetic pathway

40
Q

reflexive visceral afferent follows what pathway in the ovaries and uterine tubes?

A

Follows parasympathetic pathway (pelvic splanchnic nn)

41
Q

Sympathetic and parasympathetics of Uterus

A

Sympathetic: Lumbar/Sacral splanchnic nn.

Parasympathetic: Pelvic splanchnic nn

42
Q

Pain and non pain pathway in uterus

A

Pain

  • Fundus and body (intraperitoneal): follows sympathetic pathway
  • Cervix (subperitoneal) - follows parasympathetic pathway
43
Q

Sympathetic, parasympathetic, pain, and non pain of vagina

A

Sympathetics: Lumbar splanchnic nn.

Parasympathetics: Pelvic splanchnic nn.

Pain and non-pain visceral afferent (subperitoneal): Follows parasympathetic pathway

44
Q

Perineal (inferior) part of the vagina gets what sort of innervation?

A

somatic-pudendal n.

45
Q

What is the function of the ductus vas deferens

A

Transports sperm

46
Q

What is the thickened portion of the vas deferens prior to the prostate

A

ampula of vas deferens

47
Q

What is the function of the seminal gland?

A

Secretes a thick alkaline high fructose fluid and a coagulating agent that mixes with the sperm

* palpable if infected and enlarged

48
Q

What is the function of the ejaculatory duct?

A

Transfer sperm and seminal fluid to prostatic urethra

49
Q

What is the function of the prostate?

A

Secretes a thin milky fluid that combines with the sperm and seminal fluid to create semen

50
Q

Prostate can be sectioned into 3 zones, name them

A
  • Anterior muscular zone: between urethra and anterior aspect of prostate
  • Central (internal) zone: between ejaculatory ducts and rectum
  • Peripheral zone
51
Q

Benign prostatic hypertrophy or hyperplasia (BPH)

A
  • Common after middle age
  • Usually caused by enlargement of central zone
  • Obstruction of internal urethral orifice

Storage symptoms

  • urinary frequency
  • urgency
  • urgency incontinence
  • nocturia

Voiding symptoms

  • urinary stream hesitancy; intermittency, straining to void, dribbling
52
Q

Prostatic CA

A
  • Common in men >55
  • Usually develops in posterolateral region
  • Prostatectomy: may affect nerves of prostatic plexus -> impotence
53
Q

Function of bulbourethral glands

A

secrete a mucus-like fluid that enters the urethra during sexual arousal

54
Q

The testicular artery supplies what structures?

A

ureters, testes, epididymis

55
Q

The inferior vesical aa supply what structures?

A

Bladder; ductus deferens; seminal vesicles; prostate

56
Q

What plexus supplies the veins of the male pelvic viscera

A

Prostatic venous plexus

  • communicates with vertebral venous plexus
  • Pathway for metastasis of cancer cells
57
Q

Sympathetic and Parasympathetic innervation of male pelvic viscera

A

Sympathetics: lumbar splanchnic nn

Parasympathetics: pelvic splanchnic nn

58
Q

What innervation accounts for erection?

A

parasympathetics: cavernous n.

59
Q

What innervation accounts for ejaculation?

A

sympathetics: contract internal urethral sphincter; stimulates contraction and secretion