Small Animal Urogenital Flashcards
True/False. In both the male and the female we have the Wolffian ducts and the Mullerian ducts that degenerate.
False.
Females have Mullerian ducts and Wolffian ducts that degenerate
Males have the Wolffian ducts and the Mullerian ducts that degenerate.
Which of the following do the Mullerian ducts in females make up?
a. Uterine tubes
b. Uterus
c. Vagina
d. All the above
d. All the above
What does the Wolffian duct consist of in males?
Epididymis
Ductus deferens
Ejaculatory duct
Where do the testes develop in the fetus?
a. Retroperitoneal, just outside the peritoneal space
b. Caudal to the kidneys
c. Into the inguinal canal
d. A and B
e. B and C
d. A and B
What covers the gubernaculum as the animal grows and stays within the inguinal canal?
Vaginal tunic
The _____ extends from the tail of the epididymus to the testicle and into the inguinal canal, ending in the scrotum.
Gubernaculum
As the gubernaculum shrinks, it draws the ___ and __ through the inguinal canal and into the scrotum.
Testicle and epididymis
True/False. The Deep inguinal ring is made up of the aponeurosis of the external abdominal oblique muscle.
False. Its made up of the internal abdominal oblique muscle, inguinal ligament/prepubic tendon, and the rectus abdominis muscle.
What makes up the superficial inguinal ring?
The aponeurosis of the external abdominal oblique muscle
The _____ is a narrow elongated opening that allows the vaginal tunic and spermatic cord to pass in the male and vaginal process and round ligament of the uterus to pass in the female.
Inguinal Canal
What term refers to a retained testicle where there testes haven’t descended in the appropriate time?
Cryptorchism
True/False. A unilateral cryptorchid dog is more likely to have a retained right testicle than a retained left testicle.
True
What are the therapy procedures for cryptorchism?
Neuter/castration/orchiectomy
Where does one look if you cannot find the testis in the dog?
Look at the bladder where the ductus deferens enters the trigone and follow that to find the testes.
What is the trigone?
Triangular region bounded by the ureteric and urethral openings
True/False. The medial laminae consists mainly of fibrous tissue and the lateral udder ligaments consist mainly of elastic tissue.
False. Medial laminae consists of elastic tissue and the lateral udder ligaments consists mainly of fibrous tissue
The ____ is part of the prepuce that is unique to the boar but removed in pot bellied pigs to decrease the foul scent.
Preputial diverticulum
What are the two basic techniques for castration (orchiectomy) in our domestic animals?
Open castration
Closed castration
What is the main difference between an open castration and a closed castration?
OPEN means that the parietal vaginal tunic has been incised and in CLOSED the parietal vaginal tunic is left intact.
What is the disadvantage of an open castration?
The vaginal cavity, which is continuous with the abdominal cavity by a way of the vaginal ring, is open to the outside environment and could lead to infection if its not in a sterile area.
What is the advantage of an open castration?
You are able to vizualize the spermatic cord and vasculature better for ligation in larger animals
True/False. Due to the short length of the urethra, females are more prone to urinary tract infections.
True
Which ligaments contain the round ligaments of the urinary bladder and are remnants of the umbilical arteries?
a. Lateral ligaments of the bladder
b. Median ligaments of the bladder
c. Round ligaments of the bladder
d. All the above
a. Lateral ligaments of the bladder
What is the elevated crest extending from the neck of the bladder and into the dorsal wall of the pelvic urethra?
Urethral crest
The ____ is a smooth muscle innervated by the pelvic nerve.
Detrusor muscle
What is the name of the hillock on the urethral crest that contains the openings of the deferent ducts on either side?
Colliculus seminalis
What erectile tissue surrounds the penile urethra?
The bulb and the corpus spongiosum
What are the three components of the vaginal tunic?
Parietal vaginal tunic
Visceral vaginal tunic
Mesorchium: connects mesentery containing vessels and nerves of testis
What are the surrounding layers from external to internal of the testes?
Spermatic fascia
Vaginal tunic
Tunica albugenia
What collects and houses the sperm produced in the testis and is connected to the testicular capsule?
Epididymis
Which artery supplies the testes and is a direct branch from the abdominal aorta?
Testicular arteries
What supplies the scrotum and prepuce?
External pudendal artery
Which arteries give rise to the external pudendal artery, starting from the external iliac artery?
External iliac a. –> deep femoral a. –> pudendoepigastric a. –> external pudendal a.
What is the autonomic innervation of the testes via the pelvic plexus?
SNS = hypogastric n. PSNS = pelvic n.
The ___ is an example of somatic innervation that provides sensory to the anus, scrotum, and prepuse.
Pudendal nerve
Which somatic nerve gives sensory to the spermatic fascia, scrotum, and prepuce?
Genitofemoral nerve
Which of the following is false in regards to the ductus deferens?
a. Transports sperm from the tail of the epididymis to the pelvic urethra after ejaculation
b. Component of the spermatic cord, located within the vaginal tunic
c. Blood supply is from the branch of the prostatic artery, which is a branch of the internal pudendal a.
d. None of the above is false
d. None of the above is false
True/False. The right and left deferent ducts extend through the vaginal rings, curve around the cranial aspect of the lateral ligaments of the urinary bladder, and open on either side of the colliculus seminalis.
True.
What are the two types of penis?
Musculocavernosus
Fibroelastic
The ___ have a large corpus cavernosum and are enclosed, are innervated by delicate CT septa, and require large amounts of blood to achieve an erection
Musculocavernosus
True/False. The blood flow into the penis increases and the venous outflow is obstructed with musculocaverosus penis.
True
Which of the following is false regarding a musculocavernosus penis?
a. Requires more time to achieve full erection
b. Boar and ruminant species have this type of penis
c. Erection leads to an increase in length and girth of the penis
d. All of the above are true
b. Boar and ruminant species have this type of penis
- Found in Stallion, dog, and man
Which of the following is false regarding a fibroelastic penis?
a. Boar and ruminant species have this type of penis
b. Penis does not increase greatly in size and full erection is achieved rapidly
c. Protrusion is largely due to straightening of the preexisitng sigmoid flexure
d. Rhythmic muscular contractions force the blood through the cavernous spaces
d. Rhythmic muscular contractions force the blood through the cavernous spaces
- only applies to musculocavernosus penis
Which part of the penis is formed by the left and right crura, bulb, and surrounding musculature?
a. Glans
b. Body
c. Root
d. All the above
c. Root
Where is the os penis of the dog located?
Within the glans
What are the different components of erectile tissues?
Corpus spongiosum
Corpus cavernosum
Bulb
Glans
True/Flase. The corpus spongiosum is surrounded by the tunica albuginea and covered by the ischiocavernosus muscle proximally.
False. The corpus cavernosum
What surrounds the penile urethra and extends the entire length of the penis?
Corpus spongiosum
Which of the following is true regarding the corpus cavernosum?
a. Does not extend to the apex of the penis
b. Expands near the root as the bulb of the penis
c. Extends from the root to the glans
d. None of the above are true
a. Does not extend to the apex of the penis
What is the cranial extension of the corpus spongiosum over the distal end of the corpus cavernosum?
Glans
What are the two components of the glans in the dog?
Bulbus glandis
Pars longa glandis
What has to be engorged in order for there to be a “tie” between the dog and bitch?
Bulbus glandis
Which of the following form a fibrous ring with the opposing muscle at the pelvic symphysis and encircle the common trunk of the right and left dorsal veins of the penis, assisting with penile engorgement?
a. Ischicavernosus m.
b. Ischiourethralis m.
c. Bulbospongiosus m.
d. Retractor penis m.
b. Ischiourethralis m.
Which of the following have transversely oriented fibers that cover the bulb at the root and longitudinally oriented fibers that extend distally onto the body?
a. Ischicavernosus m.
b. Ischiourethralis m.
c. Bulbospongiosus m.
d. Retractor penis m.
c. Bulbospongiosus m.
What blends with the fibers of the external anal sphincter proximally and extends distally on the ventral aspect of the penis and insets on the glans?
a. Ischicavernosus m.
b. Ischiourethralis m.
c. Bulbospongiosus m.
d. Retractor penis m.
d. Retractor penis m.
What are the boundaries of the pelvic inlet?
Lateral: arcuate line of the ilium
Ventral: pecten of the pubis
Dorsal: promontory of the sacrum