Lecture 5: Histology of the Female Reproductive System Flashcards Preview

Reproduction Week 1 > Lecture 5: Histology of the Female Reproductive System > Flashcards

Flashcards in Lecture 5: Histology of the Female Reproductive System Deck (46)
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What are the female reproductive system functions?

1. Female gamete production
2. Male gamete reception
3. Provide environment for fertilization
4. Provide environment for implantation
5. Nourishes fetus
6. Expels mature fetus at the end of pregnancy


Where are the follicles located in ovary?

The cortex of the ovary


What is located in the medulla of the ovary?

The vasculature


What are the two major functions of the ovaries?

1. Produce female gametes
2. produce steroid hormones to prepare endometrium for conception


What is the difference between primordial follicles and primary follicles?

Primordial follicles = arrest at prophase of M1
-oocyte surrounded by one layer of granulosa cells
Primary follicles = developed during puberty
-oocyte surrounded by 2+ cuboidal epithelial cells


What is the zona pellucida?

A thick layer of glycoprotein
Secreted by granulosa/oocyte
Occupies space between oocyte and granulosa cells


What are the different stages of the female follicles?

1. Primary follicle
2. Secondary follicle
3. Mature follicle
4. corpus luteum


What stage is female gamete arrested in?

Oocyte in prophase of meiosis I


What is a follicle?

1. Germ cell
2. Surrounding follicular cells


What is the antrum?

Fluid space in follicle
Characteristic of secondary follicle


What is a graafian follicle?

The mature graffian
First meiotic division is completed
Means this is when first polar body is made


How many follicles does woman have?

450 eggs are ovulated in a woman’s lifetime


Is a follicle vascularized?

No, because it is protected by a basement membrane


In the secondary follicle, what is going on?

1. Theca folliculi differentiates into the following
a. Theca interna
-secretes androstenedione that transfers to follicular cells for testosterone production
-testosterone is converted to estradiol
b. Theca externa
-connective tissue capsule-like layer
-continuous with ovarian stroma
At this point, one follicle becomes dominant


What are the characteristics of Graafian follicles?

Completes the first meiotic division right before ovulation
Commences second meiotic division where it arrests in METAPHASE until fertilization
Fluid filled antrum (FA) is greatly enlarged and the oocyte (O2) is surrounded by the corona radiate (CR)


What is the corona radiatia?

Innermost layer of the cumulus oophorus
Directly adjacent to zona pellucida
Surrounds zona pellucida!!
Supplies vital proteins to the cell


What are the characteristics of atretic follicles?

Follicular atresia occurs at any point in the cycle
-both the oocyte and the granulosa cells are degenerating
in this case of early atresia
Follicular cells/oocytes die and are phagocytized
Occurs constantly but is maximal after birth, during puberty and during pregnancy


Where does fertilization take place?



What are the histologic characteristic of an atretic follicle?

-characterized by gross thickening of basement membrane between granulosa cells and the theca interna
Called a glassy membrane (GM)


What is the purpose of the corpus luteum?

Becomes a endocrine gland
Secretes progesterone
Granulosa and theca layers turn into granulosa lutein and theca lutein cells
Granulosa lutein secretes Prog and Estro
Theca lutein cells secrete Androstenedione and Prog


What is the purpose of progesterone?

PREVENTS further follicles from maturing


What is the corpus albicans?

Inactive fibrous tissue mass that forms following the involution of the corpus luteum


What are the three different parts of the oviduct (fallopian tube)?

1. Infundibulum (closest to ovary)
2. Ampulla
3. Isthmus
4. Interstitial part (closest to uterus)


What is the function of the epithelium of the ampulla?

Activates spermatozoa (capacitation)
Secretes nutrients for egg
Protects egg
Propells egg towards the uterus by ciliated cells


Are females with immotility syndrome (Kartagener’s syndrome) fertile? Significance?

Means females use smooth muscle rather than cilia for fertility


What are the three layers of the oviduct?

1. mucosa (inner layer, contains cilia)
2. muscularis (smooth mucle middle layer
3. Serosa


What is tubal ectopic pregnancy?

When the fertilized ovum implants in the all of the oviduct
Tube bursts, bleeding in peritoneal cavity


What are the three layers of the uterus?

1. Outer serosa/adventitia
2. Myometrium
-smooth muscle bundles separated by connective tissue
3. Endometrium (mucosa)
-consists of the epithelium and the LAMINA PROPRIA containing simple tubular glands
-functionalis and basalis


What is the internal os of the uterus?

The narrowing of the uterine cavity…right above cervix


What are the two layers of the endometrium?

1. functionalis
2. basalis