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Samsam Anatomy Test 5 - MALE PELVIS

Terms in this set (46)

male urethra
a muscular tube about 20cm long, it starts from internal urethral orifice of the urniary bladder to the external urethral orifice at the tip of the glans penis
prostatic part
4cm long, inside the prostate, most dilated part of the urethra, ends where the urethra is covered by the external urethral sphincter
prostatic urethra
has urethral crest on posterior wall, on both sides of which are prostatic sinuses into which most prostac ductules open, ejaculatory ducts open on or near the prostatic utricle
membranous part
part surrounded by the external urethral sphincter and the perineal membrane, most vulnerable part of injures
Cowper's (bulbourethral) glands
open into the spongy uretha
Spongy urethra
15-16cm long, starts from bulb of penis and ends at the external urethral office of the glans penis
bloody supply of urethra
inferior vesical and middle retail arteries and the internal pudendeal artery to the lower parts
innervation of urethra
pudendal n, pelvic splanchnic nn and sympathetic system
testis
suspended in the scrotum by the spermatic cord, left is hanged more inferiorly
tunica albuginea
tightly envelops testis
septae
divide the testicle into 200-300 lobules
lobule
contains many seminiferous tubules, lead into the tete testis with straight endings: tubule recti; inter connected
male internal genital organs
composed of testis, epididymis, vas deferens, seminal vesicle, ejaculatory duct, prostate and bulbourethral glands
blood supply of testis
testicular arteries from abdominal aorta
veins of testis
blood from epididymis and the testis gets into the pampiniform plexus and from there to the testicular vein, left testicular vein drains into the left renal vein and right directly into the IVC
pampiniform venous plexus
thermoregulator of the testis to keep the temperature constant
innervation of testis
sympathetic from T7 and parasympathetic from vagus coming along the testicular artery as testiculuar plexus
lymph drainage of testis
to the pre aortic and lumbar lymph nodes
scrotum
skin, dartos fascia, external spermatic fascia, cremaster muscle and fascia, internal spermatic fascia, tunica vaginalis; genitofermoral and ilioinguinal, pudendal and poserior femoral cutaneous nerves
epididymis
consists of a head, a body, and tail; lies on the posterior sufae of the testis covered by tnica vaginalis except for its posterior border; head consists of the convoluted tubules which become smaller toward the tail, producing the epididymal duct
spermatozoa
produced in the lumen of the seminiferous ducts, transported to the rete testis and efferent ductules and then to the epididymis to be stored
ductus deferens
50-60cm long, ascends in the spermatic cord and runs throughout the inguinal canal, turns toward the pelvis external to the parietal peritoneum and ends by joining the duct of the seminal vesicle to form the ejaculatory duct; crosses superior to the ureter
ampulla of ductus deferens
before joining the duct of the seminal vesicle it has a dilation called
mucosa of ductus deferens
high columnar double layered epithelium with sterocilia
seminal vesicle
bag-like glands, 5-10cm long, convoluted structures which lie posterior to the bladder between rectum and the funds of the bladder; superior to prostate; alkaline secretion constitute bulk of semen
prostate
3cm long, largest accessory gland of the male reproductive organ behind the pubic symphysis, has size and shape of a chestnut, 2/3 glandular and 1/3 fibromuscular
prostate function
produces a thing opaque, weakly acidic secretion which contains proteases, citric acid, spermine and spermidine, and protoglandins
blood supply prostate
inferior vesicle, midle rectal, and internal pudendal arteries
venous drainage prostate
produce a venous plexus around the sides and the base of the prostate which drain into the internal iliac veins
perineum
divided into the anal and urogenital triangle by drawing a line across the ischial tuberosities
anal triangle
contains the anus
urogenital triangle
contains the external genitalia
perineal body
center of the perineum at the midpoint of the line joining ischial tuberosities, which is the site of attachment of the perineal muscles (nn pudendal nerves)
external anal sphincter
closes the anal canal and supports the perineal body; inferior anal nerve
penis
composed of 3 cylindrical parts; corpora cavernosa x2 which are erctile tissues and corpus spongiosum; all enclosed by a fibrous capsule
prepuce
is the prolongation of the skin and fascia of penis extended as a double layer over the glans
erection
accompanied by relation of helicon arteries due to stimulation of the parasympathetic nerves; blood rushes to fill sinus of corpora cavernosa; veins compressed and corpora cavernosa and spongiosum become enlarged, rigid
emission
sympathetic stimulation causes the ductus deferens and seminal vesicle to deliver the semen to the prostatic urethra by means of peristalsis
ejaculation
projectile outflow of semen from external urethral orifice, contraction of urethral muscle and bulbospongious muscle by somatic nerve
hypospadias
congenital anaomly; eternal urethral orifice opens on ventral aspect of the glans penis; due to failure of fusion of the urogenital folds in embryonic life
phimosis
when prepuce of penis is too tight over the glans and cannot be retracted to uncover the glans penis; in these cases smegma, the oily and cheesy-like secretion of the of the sebaceous glans in the prep use cause irritation of the glans
paraphimosis
when retraction of the prepuce over the glans constricts the neck of the glans and interferes with the blood supply; circumcision should be cone
clitoris
originates as 2 limbs; erectile organs and functions only as an organ of sexual arousal
vestible
space between the labia minora that contains the opening of the urethra, vagina and the greater and lesser vestibular glands
hymen
thin fold of mucous membrane in a virgin that covers vaginal orifice
bulbs of vestibule
consists of venous plexus which are covered by the bulbospongiosus muscle; homologous with the bulb of the penis
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