exam 4 development of GI/reproductive Flashcards
what differentiates into hepatic tissue?
mesoderm
what induces mesoderm to differentiate into hepatic tissue?
hepatic duct system buds off future duodenum into ventral mesentery
what happens to the dorsal mesentery during stomach development
pancreatic duct system buds from duodenum & spleen differentiates in situ
what is the vitelline duct? what is it associated with?
when the “yolk stalk” - connection to yolk sac - constricts
jejunum
what happens if the vitelline duct persists? what is this called?
if it persists, known as Meckle’s Diverticulum, ligament/cysts, or umbilical fistula
Distinguish between a fibroelastic penis and a musculocavernous type of penis. In which species are each found? Describe the sigmoid flexure in those species that possess it.
fibroelastic: erection straightens with sigmoid flexure (increase length without increase diameter)
- ruminants/pigs
musculocavernous: large blood spaces, erection changes length and diameter
- horses/carnivores
what is within the spermatic cord
testicular a.
testicular v.
testicular n.
ductus deferens
what is the vaginal tunic
spermatic cord
testis
what muscle pulls the testes to the body wall to be warmed
cremaster m.
what domestic species has an os penis
carnivores (dogs/cats)
pelvic urethra
penile urethra
seminal colliculus
urethra from bladder –> penis
urethra from penis –> exterior
openings of ductus deferens on urethra, surrounded by prostate
penile spines on feline glans penis are ____ dependent
androgen (testosterone)
sex glands in the dog
prostate and ampulla
sex glands in the tomcat
prostate
bulbourethral
sex glands in the stallion
ampulla
prostate
vesicular
bulbourethral
The accompanying diagram indicates the transection
sites for routine ovariohysterectomy (A – C). Identify
by name the arteries that are ligated at each transaction
site.
Right ovarian a.
Left ovarian a.
Uterine a.
