E3 Reproduction Anatomy Flashcards
What are the 3 uterus types?
Duplex, bicornuate, simplex
What 3 animals have a duplex uterus?
opossum, mouse, rabbit
Duplex uteruses have how many cervixes and no ________ and how many vaginas
2 cervixes and no uterine body and 1 or 2 vaginas
What 5 animals have bicornuate uteruses?
cow, ewe, mare, sow, bitch
Characteristics of bicornuate uteruses
1 cervix, uterine body, developed urine horns, 1 vagina
What 3 animals have extremely long uterine horn?
sow, dogs, cats
What does extremely long uterine horn enable
multiple births
What is a common problem in cattle when trying to AI?
Think you are in the cervix but are actually in the fornix
In cattle, you inseminate the right side uterine horn one month and then the
left side uterine horn the next month
A sow has broad ligaments which
hold uterine horn in place
What cervical differences does a mare have compared to a cow?
cervical lumen greatly expands and contracts during the estrous cycle
cervix has only longitudinal finds with no transverse cervical rings
A cow and ewe has what within their cervix
annular rings
Avians do not have a uterus, it is a
shell gland
What are avians anatomical adaptation within their uterus?
light for flight
Vulva
outer covering
Labia
interior of vulva (acts as a seal)
Clitoris
similar to penis in males
Vagina
interior, bladder stems off
Cervix
beyond vagina, made of cartilage
Uterus
consists of uterine body and uterine horns
Where is semen deposited during AI in cattle?
in uterus just beyond cervix
Where is semen deposited in sheeP.
ejaculation in vagina
Boars ejaculate in the
cervix
Oviduct
extends from horns to ovaries
What is the first part of the oviduct?
Isthmus
Pulsating is much more pronounced in
sows
Gametogenic
produce sex cells
A follicle resembles a
pimple
What acts over the ovary to stimulate follicle growth?
FSH
How many follicular waves respond to FSH for ovulation?
2-3
What is the Corpus hemiragicle
bloody body where the follicle ruptured
Corpus retium is known as the __________ and is the ___
“yellow body”
CL
What is a source of progesterone and stops the body from cycling?
Corpus retium
If pregnancy is not established
the CL will not lyse
Corpus albicans are
tiny scars that remain after complete regression of the earlier lutea
What forms after the CL lyses?
Corpus albicans
What are the two classifications of follicles?
Normal (healthy) or atretic (degenerating)
Testes are descent by birth besides in what animals
whales, dolphins, pachyderms, armadillo, birds
The paired testes of male farm mammals are located in a muscular bag called the
scrotum
Continuous breeders have a
scrotum
Seasonal breeders ascend/descend from the
inguinal canal
Scrotum
thermosensor, radiator, protective sac
Spermatic Cord
contains testicular arterty, spermatic vein, nerves, vas deferens, external and internal muscles
External Cremaster & Tunica Dartos Muscle
regulates temperature by moving testes closer to or farther from the body wall
Pampiniform plexus
heat exchange, testosterone exchange, pulse pressure eliminator
Sheath
correct angulation desired
Inguinal ring
opening in body wall allowing testicles to drop
Cryptorchid
can get a female pregnant but sperm production isnt best, testicles in body cavity, can be surgically prepared
Smegma
source of boar odor that attracts sows (secreting pheromones, firing salvia)
Male genital area is how many degrees cooler than body temperature?
4 to 8 degrees cooler than the rest of the body
Cremaster muscle
skeletal muscle, spermatic cord (short term, fear/excitement)
Tunica dartos muscle
smooth in scrotum (long term contraction, function lost with contraction)
Pampiniform plexus
necessary for spermatogenesis not testosterone production
2 ways male reproduction is different than female
dont remain in body cavity and all potential gametes not present at birth
Gametogenic
produce sperm cells (seminiferous tubules)
Endocrine
produces hormones (Testosterone (Leydig cells))
How many days does it take sperm cells to mature?
45-60
What are the two categories of penis?
Fibroelastic and vascular
Fibroelastic penis
contraction of muscles
Vascular penis
blood rushes to penis
What is the epididymus?
Tube (duct) leading from the testes
The epididymus does what to sperm
collect and stores spem (which migrate slowly)
Caput
head
Duct
body
Cauda
tail
Where is the primary site for sperm storage?
Cauda
Where do the sperms mature?
Caput and Duct
Vas Deferens is the
tubal passageway for sperm/ejaculate mix
What connects the epididymus and urethra
Vas Deferens
Vas deferens contracts with
peristaltic effect which causes ejaculation
What is a vasectomy?
When the Vas Deferens are cut
What is the common passageway for semen and urine
Urethra
Penis is what type of organ
copulatory
What animals have a fibroelastic penis?
bull, ram, boar
Fibroelastic penis are what shape
S shaped
Fibroelastic penis are more _______ which mean they dont require as much blood for ejection
cartilaginous
Fibroelastic penis _________ when erect
straighten
The _______ penis muscle in fibroelastic penis restores __________
retractor
sigmoid flexure
What animals have a vascular penis?
stallion, dog, cat, man
Vascular penis are enlarged by
engorgement of blood
A dog has a
os penis bone
What is the glans of the penis?
homologue of clitoris
sensory
Cat (tom)
spines, disappear with orchidectomy
Orchidectomy
surgical removal of one or both testicles
Prepuce
foreskin on the sheath
Corpus cavernosum (CC)
spongy, erectile tissue
Majority of male sheaths are
corpus cavernosum
Corpus spongiosum (CS)
around penile urethra
Accessory sex glands all contribute to
seminal fluid volume
support nutrition of sperm
smegma
pH buffers
Sperm is temperature
dependent
Smegma is a harmless combination of
oils, skin cells, swear, and other fluids that accumulate around genitals
Seminal vesicles are
pair glands, attached to urethra near bladder, produce large volume of fluids, flushes urethra, acts as a vehicle for sperm transport, also contains fructose
Prostate gland
compound gland lying over urethra at neck of bladder
Secretions in the prostate gland stimulate
sperm activity
Bulbourethral (Cowper’s) Glands lie below
prostate on either side of urethra
Bulbourethral (Cowper’s) Glands produces
lubricating and cleansing fluid just prior to ejaculation
Rams have a similar reproduction tract as
bulls
Boars have large testes, inverted with
tail of epididymus uppermost
Boars have large
bulbourethral glands (gelatinous secretion)
Boars pronounce preputial pouch which contributes to
boar odor, aka boar taint
Stall have
horizontal testicles, vascular penis, no sigmoid flexure
Roosters testes are
inside body cavity near lungs
Roosters have a
cloaca
Copulatory organ of a rooster
transports sperm
Roosters are temperature independent because
they are inside the body cavity
Sperm production is controlled by
FSH
Testosterone production is stimulated by
LH
Spermatogenesis is similar to oogenesis because it is controlled by
FSH
What causes release of dominant follicle>
LH
Preputial pouch
pouch forward of the sheath
Penectomy
penile diversion
BSE
Breeding Soundness Examination
Ram have a
hair like appendage at the end of their penis
What animals have horizontal testes?
stallion and boar
What animals have straight down testes?
Ram and bull
Where does a bull and sheep deposit semen?
In the vagina
Where does a boar deposit semen?
In the cervix
Bloody body
Corpus hemiragicle
Yellow body
Corpus retium
What animals lack the sigmoid flexure?
Horse and rooster
What two things does BSE stand for?
Breeding Soundness Exam &
Bovine Spongiform Encephalopathy
What is Bovine Spongiform Encephalopathy?
Mad Cow Disease
Eutherian
placental mammals
Syngamy
fusion of embryo and sperm
occurs in ampullary-isthmus junction
Ampullary-isthmus junction
fertilization
Uterotubal junction
selective gate passage of individual spermatozoa with normal morphology
Precocial
animals born with ability to take care of themselves
Preputial
pouch that contributes to smegma
Cryptorchid
still fertile
Polyspermy
when an osteocyte is penetrated by more than one sperm (we do not want this)
Zona pellucola
part of egg to keep polyspermy from happening
What does the vet look for when sperm is evaluated?
morphology, motility, density
What does a chicken lack?
A uterus
3 basic structures of the ovaries
follicle, corpus luteum, corpus albicans
Follicle
blister-like structure on ovary that contains maturing egg
When a follicle is fully mature,
the follicle ruptures and releases egg
Corpus luteum
active tissue that develops on the ovary at the site where an ovum has shed
If conception occurs, tissue in the corpus luteum becomes functional, producing
progesterone
Corpus albicans
tiny scars that remain after complete regression of the earlier lutea
forms after the CL lyses
What the points of attachment on the placenta?
Placetons
What is the fetal side of the placenta?
cotyledonary
What is the maternal side of the placenta?
caruncle
Together, the cotyledonary and caruncle make up the
placentome