Perineum

Question 1

General Boarders of Perineum

Answer 1

Mons pubis anteriorly
Medial surfaces of proximal thigh laterally
gluteal fold and intergluteal cleft posterialy

Question 2

Osseofiberous boarders

Answer 2

pubic symphysis anteriorly
ischiopubic rami anterolaterally
ischial tuberosities laterally
sacrotuberous ligament posterolaterallly
inferior sacrum and coccyx posteriorly

Question 3

Anal triangle

Answer 3

posterior to transverse line

containes anus bounded by two ishioanal fossae

Question 4

Perineal body

Answer 4

central part of perineum
irregular shaped fibromuscular tissue located at midpoint of transverse line
*posterior to vestibule of vagina or bulb of penis
*anterior to anus and anal canal
-attatches to posterior boarder of perineal membrane
-attatchment point for many muscles

Question 5

What muscles attach to perineal body

plus 2 other landmarks

Answer 5

superficial transverse perineal M
Deep transverse perineal M
(posterior)

External anal sphincter
bulbospongiosus

Question 6

Root of Penis

Answer 6

located in superficial perineal pouch, attatched to perenial membrane

consists of crura and bulb of penis

Question 7

crura of penis

Answer 7

bilateral slender masses of erectile tissue
attatched to internal part of each ischial ramus

continuous with corpus cavernosa in body of penis

surrounded by ischiocavernosus M

Question 8

How does blood flow from crus into corpus cavernosum?

Answer 8

contraction of ischiocavernous M forces blood from crus into corpus cavernosum of penis

Question 9

What innervates ichiocavernosus M

Answer 9

deep perenial nerve from pudendal N

Question 10

Body of penis

Answer 10

suspended from pubis by syspensory ligament of penis

contains no muscles

comprised of 3 cyndrical bodies of erectile tissue

Question 11

corpra cavernosa

Answer 11

continuous with crura of penis and located dorsally in penis

fused in midline
surrounded by tunica albuginea

does not extend into glans penis

Question 12

corpus spongiosum

Answer 12

continuous with bulb of penis

surrounds spongy urethra which opens at external urethral orfice

Question 13

glans of penis

Answer 13

Superficial penile fascia
deep penile fascia
suspensory ligament of penis

Question 14

superficial penile fascia

Answer 14

thin layer of adipose free facual tissue
provides mobility of skin on penis
contains neurovasulatureof bolbus pubis

Question 15

deep penile fascia

Answer 15

surrounds corpa cavernosa and corpus spongiosum
deep dorsal neurovasculature are enclosed by this fascia
-these penetrate tunica albuginea and supply erectile tissue

Question 16

Suspensory ligaments of penis

Answer 16

extends from anterior surface of pubic symphysis to root of penis
fuses with deep penile fascia
anchors erectile bodies of penis to pubic symphysis

Question 17

Arterial supply to penis

Internal Pudendal artery branches

Answer 17

internal pudendal Artery–> supplies most penile tissue via the following branches:
Dorsal Artery of Penis
Deep Artery of Penis
Artery of Bulb

Question 18

Arterial supply to penis

External Pudendal Artery

Answer 18

External pudendal artery supplies proximal penile skin
- Deep and superficial arteries that branch from Femoral Artery!
-

Question 19

Venous drainage of penis

Answer 19

Deep dorsal Vein of penis

Superficial Dorsal vein of penis

Question 20

Lymphatic Drainage of Penis

Answer 20

Most efferents to superficial inguinal lymph nodes

Question 21

Innervation of penis

Answer 21

Dorsal Nerve of penis- terminal branch of pudendal nerve sensory innervation of skin and glans penis

Cavernous nerve- parasympathetic fibers branching from prostatic plexus of nerves
innervate deep Artery of penis and responsible for erection

Question 22

Mons Pubis

Answer 22

rounded fattty prominence covered with pubic hair

Question 23

labia majora

Answer 23

prominant folds of skin on either side of pudendal cleft

Question 24

labia minora

Answer 24

folds of fat free hairless skin enclosed in pudendal cleft forms clitoris

Question 25

clitoris

Answer 25

erectile organ
root- comprised of two crura located along internal surface of ischial rami
body- comprised of 2 corpora cavernosa
glans- function of sexual arousal

Question 26

vestibule of vagina

and what does it contain?

Answer 26

space between labia minora where urethra and vagina open externally

contains the hymen- thin fold covering the vaginal surface
usually crescent shaped posteriorly

Question 27

Bulb of vestibule

Answer 27

paired masses of elongated erectile tissue deep to labia minora

Question 28

Vestibular glands

Answer 28

round or oval glands located on each side of vestibule posterolateral to vagina- homologus to bulbospongiosus muscle

Question 29

arteriole supply to vagina

Answer 29

external pudendal A- supplies skin and superficial fascia

internal pudendal artery Via Deep artery of cliteris supplies erectile tissue in clitoris

Question 30

Venous drainage of vulva

Answer 30

internal pudendal Vein

Question 31

Lymphatic drainage of vulva

Answer 31

efferent drainage is via superficial inguinal lymph nodes

Question 32

innervation of the vulva

Answer 32

somatic innervation via
ilioinguinal nerve
genitofemoral nerve
pudendal nerve

parasmpathetics in cavernous nerve from uterovaginall nerve plexus increases secretion and erection of clitoris