Histology - Repro, Endo Flashcards
(44 cards)
What type of epithelium is found in:
Ectocervix/exocervix
Stratified squamous epithelium, nonkeratinized
What type of epithelium is found in:
Endocervix
Simple columnar epithelium
What type of epithelium is found in:
Ovary and outer surface
Simple cubodial epithelium
What type of epithelium is found in:
Fallopian Tubes (2)
Simple columnar, ciliated
Peg cells
What type of epithelium is found in:
Uterus
Simple columnar epithelium with glands (long tubular or coiled)
Identify:
Primary Follicle
cubodial/columnar mitotically INACTIVE granulosa cells (1-2 layers) surrounding an enlarged oocyte
Identify:
Graffian Follicle / mature follicle
contains theca layer, which surrounds the granulosa layer, which surrounds the cumulus oophorus (eccentric location and projects into the well developed antrum)
Identify:
Corpus Albicans
Identify:
Secondary Follicle
mitotically ACTIVE granulosa cells (3-5 layers), and a zona pellucida that surround the oocyte
Identify:
Corpus Leuteum
Once the oocyte is released and in the absence of fertilization, the collapsed ovulatory follicle becomes the corpus luteum, which is 1.5-2.0 cm round structure with festooned contours, clear/yeallow cells and a cystic center; as it regresses, it is invated by connective tissue that gradually converts it to a scar (round, pink, relatively acellular structure) = corpus albicans
Identify and describe:
Primordial Follicle
Consists of a primary oocyte (40-70 um in diameter) surrounded by a single layer of flattened, mitotically INACTIVE, granulosa cells resting on a thin basal lamina
Identify the structure and the individual sections A and B.
Which section is responsive to hormonal changes?
Uterus
A= endometrium
*its functional layer, varies in thickness according to hormonal influences
B= myometrium
NOT affected by hormonal changes
Identify:
Fallopian tube:
long slender plicae (folds) resting on the muscularis
HIgh power photmicrography of tubal epithelium shows predominantely ciliated cells (help sweep the oocyte to the uterus) with scattered secretory cells = PEG cells; peg cells don’t have cilia but produce secretions to protect oocyte and promote fertilization
Which cells are the smallest and most numerous type of follicles in the cortex of the ovary?
Primordial follicles - each contains a germ cell (primary oocyte), surrounded by a layer of somatic squamous tissue = follicular cells, which support the oocyte
As it grows and transforms into a primary follicle –> follicle cells increase in height and become cubodial cells. The follicle cell layers gradulaly increase and their cytoplasm begins to have a granular appearance = granulosa cells (follicle cells surrounding an oocyte which ahve proliferated and transformbed)
What is the major function of granulosa cells?
How do they change throughout the cycle?
Production of sex steriods.
FSH stimulatse granulosa cells to convert androgens (from theca cells) to estradiol via aromatose
After ovulation, granulosa cells become granulosa lutein cells that produce progesterone.
*granulosa cell tumors of the ovary are neoplasms composed of granulosa cells that may produce excess estrogen. This may result in precocious puberty in children or endometrial hyperplasia/endometrial cancer in adults
Identify the * within the breast tissue:
Breast adipose tissue
Identify the * within the breast tissue:
Breast ducts
Identify the * within the breast tissue:
Breast stroma
What are the levels of…
Progesterone?
Estrogen?
= secretory endometrium
HIGH progesterone
LOW estrogen
After ovulation, the uterus has secretory endometrium. Secretory endometrial glands have saw-tooth shaped lumen with subepithelial vacuoles. The secretory endometrium corresponds to a corpus luteum, high progesterone levels and low estrogen levels. Once the corpus luteum regresses, the progesterone effect on tthe secretory endometrium is ended and menstruation occurs.
What are the levels of…
Progesterone?
Estrogen?
= Proliferative endometrium
LOW progesterone
HIGH estrogen
Proliferative endometrium glands have small round lumen with an epithelial lining that appears as pseudostratified columnar epithelium.
Associated with a maturing graafian follicle, increasing levels of estrogen and decreased levels of progesterone
Followed by an INC in FSH and LH and still INC levels of estrogen and ovulation
Vaginal mucosa is comprised of what type of epithelium?
Nonkeratinized stratified squamous epithelium
+ underlying lamina propria (dense elastic connective tissue with many elastic fibers)
Identify A and B regarding the intralobular duct of the breast:
Which cell type [A or B] are stimulated by oxytocin to contract and push milk out of alveoli and ducts in a lactating female?
A = myoepithelial cells
B= cubodial epithelial cells
Intralobular breast ducts are lined by cubodial epithelial cells and underlying myoepithelial cells.
Myoepithelial cells are simulated by oxytocin to contract and push milk out of the alveoli and ducts in a lactating female
Identify the three types of cells and what is the main function?
Big middle = Basophils. Secrete TSH, LH and FSH
Little red = Acidophils. Secrete GH and prolactin
LIttle purple = chromophobes = undifferentiated cells that could become either basophils or acidophils.
Identify structures A and B of the pituitary:
A = neurohypophysis (posterior pituitary = pale!)
B = adenohypophysis (anterior pituitary)
