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
Is the distance between the internal urethral orifice and external urethral orifice longer in males or females?
Longer in males
26
Identify a and b
a. Ovary b. Ovarian Ligament
27
Identify c and d
c. Fimbriae d. Fallopian tube
28
Identify e and f
e. suspensory ligament of ovary f. broad ligament
29
The broad ligament of the uterus contains what 3 parts?
* Mesosalpinx * Mesovarium * Mesometrium
30
Uterus is composed of what three tissue layers?
1. Perimetrium (superificial) 2. Myometrium 3. Endometrium
31
What is the point where the uterus and fallopian tubes meet?
Uterine horn
32
What is the superior portion of the uterus called?
Fundus of uterus
33
What is the name for the divide between the body of the uterus and the cervix?
Isthmus
34
Name the proximal and distal narrowing area of the cervical canal
Internal os: between uterus and cervix External os: between cervix and vagina
35
Identify 6 and 7
6: Anterior vaginal fornix 7: Posterior vaginal fornix
36
What area lies between labia minora at the entrance to the vagina?
Vestibule of vagina
37
What is a culdocentesis
inserting a needle through the posterior vaginal fornix and into the rectouterine pouch
38
Uterine blood supply
* Ovarian a. * Uterine a. * Vaginal a. * Internal pudendal a. \* Hysterectomy: all arteries must be ligated
39
Innervation: Ovaries and Uterine tubes
Sympathetic: lumbar splanchnic nn. Parasympathetic: pelvic splanchnic nn. Pain: aobe pain line: follows sympathetic pathway
40
reflexive visceral afferent follows what pathway in the ovaries and uterine tubes?
Follows parasympathetic pathway (pelvic splanchnic nn)
41
Sympathetic and parasympathetics of Uterus
Sympathetic: Lumbar/Sacral splanchnic nn. Parasympathetic: Pelvic splanchnic nn
42
Pain and non pain pathway in uterus
Pain * Fundus and body (intraperitoneal): follows sympathetic pathway * Cervix (subperitoneal) - follows parasympathetic pathway
43
Sympathetic, parasympathetic, pain, and non pain of vagina
Sympathetics: Lumbar splanchnic nn. Parasympathetics: Pelvic splanchnic nn. Pain and non-pain visceral afferent (subperitoneal): Follows parasympathetic pathway
44
Perineal (inferior) part of the vagina gets what sort of innervation?
somatic-pudendal n.
45
What is the function of the ductus vas deferens
Transports sperm
46
What is the thickened portion of the vas deferens prior to the prostate
ampula of vas deferens
47
What is the function of the seminal gland?
Secretes a thick alkaline high fructose fluid and a coagulating agent that mixes with the sperm ## Footnote \* palpable if infected and enlarged
48
What is the function of the ejaculatory duct?
Transfer sperm and seminal fluid to prostatic urethra
49
What is the function of the prostate?
Secretes a thin milky fluid that combines with the sperm and seminal fluid to create semen
50
Prostate can be sectioned into 3 zones, name them
* Anterior muscular zone: between urethra and anterior aspect of prostate * Central (internal) zone: between ejaculatory ducts and rectum * Peripheral zone
51
Benign prostatic hypertrophy or hyperplasia (BPH)
* 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
Prostatic CA
* Common in men \>55 * Usually develops in posterolateral region * Prostatectomy: may affect nerves of prostatic plexus -\> impotence
53
Function of bulbourethral glands
secrete a mucus-like fluid that enters the urethra during sexual arousal
54
The testicular artery supplies what structures?
ureters, testes, epididymis
55
The inferior vesical aa supply what structures?
Bladder; ductus deferens; seminal vesicles; prostate
56
What plexus supplies the veins of the male pelvic viscera
Prostatic venous plexus * communicates with vertebral venous plexus * Pathway for metastasis of cancer cells
57
Sympathetic and Parasympathetic innervation of male pelvic viscera
Sympathetics: lumbar splanchnic nn Parasympathetics: pelvic splanchnic nn
58
What innervation accounts for erection?
parasympathetics: cavernous n.
59
What innervation accounts for ejaculation?
sympathetics: contract internal urethral sphincter; stimulates contraction and secretion