Exam 3 Flashcards
what is the blood supply to the spongy body of penis
dorsal artery of penis
what is the blood supply to the cavernous body of the penis
deep artery of penis
–think caves are deep, deep artery
what parts of the penis does the artery of the bulb supply
spongy body and bulbous glandis
what is the blood supply to the scrotum
external pudendal artery
what is the innervation to the scrotum (LIIG)ma
lumbar nerves
iliohypogastric nerve
ilioinguinal nerve
genitofemoral nerve
what is the purpose of the efferent ducts
they connect the rete testis with the initial section of the epididymis
what is contained within the spermatic cord
ductus deferens and nerve, testicular blood and lymph vessels, visceral vaginal tunic
what are the rete testis
bundled up collection of seminiferous tubules
what is the innervation of the testes
caudal mesenteric plexus
what muscles are responsible for the warming of the testes, what about the cooling?
warming = cremaster and dartos
cooling = scrotal skin and pampiniform plexus
what sex glands do horses and cattle have
all of them
A Very Big Penis
what sex glands do pigs have
Very Big Penis
Vesticular glands
Bulbourethral glands
Prostate
what sex glands do cats have
A Big Penis
Ampullary glands
Bulbourethral glands
Prostate
what sex glands do dogs have
A penis
Ampullary glands
Prostate
what sex gland produces secretions that maintain sperm vitality
ampullary glands
what happens to accessory sex glands in the absence of androgens
they atrophy
hindgut pain follows what pathway
parasympathetic
hindgut non-pain follows what pathway
PELVIC SPLANCHNIC
foregut and midgut non-pain follow what pathway
vagus nerve
preganglionic parasympathetics travel to the body via
vagus nerve
what cell bodies are found in the dorsal root ganglion of S2,S3,S4?
pain, non-pain and sensory somatic
where do all preganglionic sympathetics originate
lateral horn of T1-L4
Role of parasympathetics in the enteric NS
stimulate smooth muscle contraction and glandular secretion
sympathetics in enteric NS
inhibit SM contractions, vasoconstriction
location of thorax preganglionic sympathetics
T1-L5 (Cardiopulmonary splanchnic from C1-T5)
location of abdomen preganglionic sympathetics
T5-L4 (AP splanchnic from T5-end)
for CP splanchnic nerve or if going to body wall, where does synapse occur
paravertebral ganglion
where will abdominal pelvic splanchnic nerves synapse
outside of the chain at prevertebral ganglia
where are preganglionic parasympathetic cell bodies found
brain
preganglionic parasympathetic axons travel to the body via the
vagus nerve
preganglionic axons travel via periarterial plexus then synapse where
in ganglia of organ to be innervated
where do preganglionic parasympathetic cell bodies going to the hindgut and pelvic organs live
ventral horn of S2,S3,S4
At S1, the abdominal pelvic nerve gets a new name…
sacral splanchnic nerves. sympathetic
pelvic splanchnic nerves. parasympathetic
where does the vagus nerve end
end of the midgut
except for the gonads, pelvic structures receive postganglionic sympathetics from ??
Hypogastric ganglion / plexus
what do gonads receive sympathetic postganglionics from
cranial mesenteric ganglion
nerve that carries preganglionic parasympathetics to the body cavity including thorax, foregut, midgut
vagus nerve
nerve that carries parasympathetic innervation to organs of hindgut and pelvis, branches of ventral rami
pelvic splanchnic
what is visceral non-pain associated with
stretch receptors in the wall of pelvic viscera
pain from gonads follows what pathway
sympathetic pathway to the cranial mesenteric ganglion
both pain and non-pain from the hindgut and pelvis follow what pathway
parasympathetic
role of sympathetics and parasympathetics in the visceral plexus
sympathetic: keeps internal urethral sphincter closed
parasympathetic: inhibits sympathetics from keeping sphincter closed
role of sympathetics and parasympathetics in the rectal plexus
sympathetics: maintain contraction of internal anal sphnicter
parasympathetics: inhibit sympathetic from contracting internal anal sphnicter
role of sympathetics and parasympathetics in the prostatic plexus (males only)
sympathetic : causes ejaculation and vasoconstriction
parasympathetics: relaxation of smooth muscle and vasodilation to allow for erection
erection and ejaculation are controlled by both visceral and somatic NS
parasympathetics role in erection
low PS activity to smooth muscles in AV shunt maintains flacid penis
high PS activity closes AV shunt, allows blood to pool in erectile tissue = erection
swelling of erectile tissue compresses veins which maintains erection
what muscles do females constrict during tieing of mating
female constrictor vestibulae (ischiocavernous)
what muscles do males constrict during tieing of mating
ischiourethralis
