Female Anatomy (Chapter 2) Flashcards
What are the tubular genitalia of the female reproductive tract?
Oviducts, Uterus (Uterine Horns and Body), cervix, and vagina
What did the tubular genitalia of the female reproductive tract make up in the early embryo?
Urinary system
What are the similar layers of the tubular genitalia of the female reproductive tract from innermost to outermost?
Muscosa (inner) submucosa, muscularis, serosa
What are the 2 major functions of the ovary?
produce gametes
produce hormones
What are the functions of the uterus?
- housing compartment for pregnancy (early embryogenesis)
- roles in reproductive cyclicity of the cervix
- sperm moves thru contraction of the uterus (sperm transportation)
How does the uterus control cyclicity?
The uterus knowns if not pregnant, if so it sends a signal to kill CL so that the body can try to get pregnant again
What does the submucosa include?
blood vessels, nerves, and lymphatics
What is the lumen?
Inner cavity/space
What does the submucosa do?
Facilitate secretions
What is the mucosa?
secretory layer of the epithelium that surrounds the lumen
What is the serosa and what does it do?
Squamous cells that cover the outer layer that aids in lubrication and protection
What are the 2 parts of the muscularis and what do they do in combination with each other?
- circular smooth muscle layer (contracts in)
- longitudinal smooth muscle layer (shortening/lengthening)
- combo helps move things
What are the functions of the oviducts?
- connect the ovary to the uterus
- capture oocyte through the infundibulum
- where the female gamete is transported following ovulation and site of fertilization
What are the functions of the cervix?
- a gatekeeper to the uterus, oviducts, and ovaries from bad things (bacteria/unwanted species)
- lubrication during heat for sex (slime to catch things)
- flushing system
What is the vagina?
the copulatory organ that produces lubricating mucus during estrus
Where is the female reproductive tract located?
Beneath rectum in the rectogenital pouch
How is the female reproductive tract supported?
surrounded by the peritoneum
What is the peritoneum and its function?
- double layer of connective tissue
- membrane that liner inner cavity of abdominal and lines the organs
-supports and allows for transportation of substances
What are the three components of the peritoneum?
- mesovarium = ovary
- mesoalpinx = oviducts
- mesometrium = uterus/uterine horns
Which component of the peritoneum is associated with the ovary?
mesovarium
Which component of the peritoneum is associated with the oviduct?
mesoalpinx
Which component of the peritoneum is associated with the uterus/uterine horns?
mesometrium
Which component of the peritoneum is the largest?
mesometrium
What does the fusion of the peritoneum form?
broad ligament
True of false: the mesovarium encases the ovary.
False, it comes to form the hilus
What is the hilus of the ovary?
the stalk that provides blood, lymphatics, nerves that support the ovary?
What is ventral vs dorsal?
ventral is the front side and dorsal is the back side
What is posterior vs anterior?
posterior is pointing from the back and anterior is pointing from the front
What is cranial vs caudal?
Cranial is toward the head and caudal is toward the feet
What two things differ with reproductive tract anatomy?
nutritional preferences and digestive tract anatomy
What species have a very short uterine body?
Ruminants (cows and sheep)
What is the uterine body?
Where the 2 uterine horns come together to funnel into the cervix
What are the factors that cause variation in uterine horn length?
- genetics
- age
- # of babies (more babies = bigger horn size)
What is the infundibulum?
a membrane that floats around the ovary that catches the gamete
Follicle ___, infundibulum ____ it, and its filtered through the ____ which is where fertilization occurs.
Ovulates; catches; oviduct
Fertilized embryo floats down ___ portions into the ____. The ___ maintains pregnancy. If the embryo dies, the ____ induces the next cycle.
Tubular; uterine horns; uterus; uterus
When a follicle ruptures during ___, ____ is sent out and the infundibulum ____ it.
Ovulation; gamete; catches
If the infundibulum doesn’t catch the gamete, what happens?
The body cavity reabsorbs the gametes
The cow’s cervix is unique because?
it has 3-4 cervical rings
What are caruncles?
specific button-like structures that attach the placenta and uterus
What is the fornix vagina?
A 360 degree pouch around the cervical opening with 1 small opening in the center to trap bad things, but allow good sperm to make it to the cervix
The ____ penis doesn’t enter the cervic, but the ___ penis does?
Cow; pig
What is the 1st line of defense in the cow?
Labia
What does the cranial vagina/vagina include?
Just the reproductive system
What does the caudal vagina/vestibule include?
The reproductive and urinary systems
What are the characteristic of the cranial vagina/vagina?
A more secretory mucosa facilitated by the submucosa involved in copulation
What are the characteristics of the caudal vagina/vestibule?
- more integrity
- more acidic
- more thick layer of squamous cells
The cow has very large ____ compared to its ____?
uterine horns; uterine body
The cow has extremely small ____?
Oviducts
The cervix of the sow is unique because?
It is very rigid with interdigitating prominences
The sow has much longer ____ than the cow because ____?
Uterine horns; pigs have larger litters
The ovary is an extremely dynamic organ but has ____?
predictable change
What is the difference in an oocyte and ovum?
An oocyte is what is still considered in the follicle and is immature, while an ovum is released and mature
What are conceptus?
offspring of any age
What produces progesterone and what does it do?
The CL; maintain pregnancy
What does CL stand for?
corpus luteum
What produces estrogen and what does it do?
Follicle; induces ovulation
What are female gonads and where are they produced?
Paired structures from the mesonephric ridge
What are the layers of the ovary?
- tunica albuginea
- ovarian cortex
- ovarian medulla
What is the tunica albuginea of the ovary?
- connective tissue
- lies just beneath the germinal epithelium
- helps ovary maintain structure
What is the ovarian cortex of the ovary?
- houses oocytes (but the mare is inside out)
- produces gametes
- middle layer
What is the ovarian medulla of the ovary?
- vasculature, nerves, and lymphatics necessary for producing gametes
- inner layer
How many female gametes does a follicle house?
Only 1 each
The ovarian cortex is similar to the ________, and the medulla is similar to the ___________?
Mucosa; submucosa
For a mare to maintain pregnancy….?
Concepti must touch 12-24x a day (we can use a marble to imitate pregnancy)
All the species we study have _________ uteruses?
Bicornuate
Pigs will ovulate from one or both ovaries?
Both, with concepti on both sides that must switch sides for her to maintain pregnancy
Cranial vagina is the site of ___________ for each species except the ________?
Semen deposition; pig
Velocity of ejaculation in the __________ is so powerful that is nearly bypasses the cervix?
Horse
Estrogen sources from ___________ and is highest in the ___________?
Follicle; tertiary follicle
With estrogen, the _________ cervix relaxes?
Mare
With __________, the cervix contracts in the cow, ewe, sow, bitch, and queen?
Estrogen
The _______ uterine horns form a T-shape since they’re _________ relative to the uterine body (and don’t curve back)?
Mare; short
The mare’s cervix is unique because….?
It’s not as rigid and has cervical folds
_________ have the largest ovaries of all the species?
Mares
The ________ anomaly is that the ovarian cortex and medulla are reversed?
Mare; the ovarian cortex is interior and the ovarian medulla is exterior
Since the follicle in the mare is smaller than the ovary, the follicle doesn’t need to _______, it just needs to _________ and the _______ will migrate?
Move; soften; oocyte
What is the significance of the ovulation fossa?
Follicles moving through the medulla isn’t possible in the mare, so they have an ovulation fossa, which is where mares MUST ovulate (other species don’t have a specific location that they need to ovulate in)
When does the ovulation fossa form in the mare?
At 5-7 months of age
What are the ovarian structures (that inhabit the ovarian layers) in order of development?
- Primordial follicles
- primary follicles
- secondary follicles
- antral (tertiary) follicles
- corpora lutea
- corpora albicans
What is folliculogenesis?
The process by which follicles develop
Which ovarian structures are dominated by follicles?
Primordial follicles, primary follicles, secondary follicles, and antral (tertiary) follicles
When does ovulation occur in relation to the ovarian structures?
Between antral (tertiary follicles) and corpora lutea
Which ovarian structures are towards the corpus luteum?
Corpora lutea and corpora albicans