Flashcards in New Terms Exam 2 Deck (19)
Ovaries - Endocrine
Produce endrogens, estrogens, and progestogens
promote the growth and maturation of internal and external sex organs; development of the secondary female sex characteristics; promote breast development.
prepare internal sex organs (primarily uterus) for pregnancy by promoting changes in endometrium; prepare mammary glands for lactation.
xocrine function, as the ovaries produce the female gamete (i.e. ovum); gametogenesis; specifically the ovaries produce and ovulate a secondary oocyte.
Arrested in prophase - surrounded by follicular cells, forming primordial follicle.
Embryo oocyte dev.
Primordial germ cells - Oogonia -- primary occyte during embryology
However, beginning at the fifth month of fetal life and throughout the woman’s lifetime, primary oocytes undergo a slow degenerative processes called atresia, defined as spontaneous death and subsequent reabsorption.
• Three basic types of ovarian follicles:
1. Primordial follicles
2. Growing follicles
a. Primary follicles
1) Early or Unilaminar primary follicles
2) Late or Multilayered or Multilaminar primary follicles
b. Secondary (Antral) follicles
3. Mature or Graafian follicles - ovulate secondary oocytes
cuboidal secretory cells; in response to LH, these cells synthesize and secrete androgens (i.e. precursors of estrogen); endocrine function; also fibroblasts, collagen bundles, and lots of blood vessels.
• Theca folliculi (follicular theca)
is the sheath of connective tissue cells that develop from the stromal cells surrounding the developing follicle.
heca externa – fibrous outer portion; smooth muscle cells, fibroblast, and bundles of collagen.
Granulosa and theca interna cells after ovulation. These undergo hypertrophy and produce progesterone. Cells of theca interna only increase slightly in size. Thecaleutin cells still produce estrogens.
Perimetrium, myometrium, endometrium
Outermost layer, adventitia or seros
Muscular/middle layer - smooth muscle separated by connective tissue with vascularization. 4 layers
Simple columnar epithelium, underlying lamina propria. This layer contains uterine glands. Has 2 parts - deeper basal layer (stratum basale), stratum funcitonali. Thickness of functional layer changes on hormones - removed monthly.