1.3.2 Histology and Physiology of Ovaries Flashcards
What is folliculogenesis?
The growth and development of immature follicles and oocytes to mature follicles and ova capable of undergoing ovulation and fertilization
What is in the medulla of the ovary?
Vasculature
Lymphatics
Nerves
What are the covered part?
Following ovulation what is on of the main products of the corpus luteum?
Progesterone - important for preparation of the uterus for possible implantation
What are the basic events that lead to ovulation?
Increasing pressure and proteolytic activity leads to oocyte release
What is this an image of?
Graffian follicle
The granulosa helps produces?
Contains aromatase which will convert androgen to estrogen
What happens before ovulation?
Increasing estrogen which leads to an ovulatory surge of LH (HUUUUUGELY HIGH YIELD)
Describe the length of each stage of follicular growth
What happens to the number of oocytes during development?
There is a large surge of the number, then a large amount of them die
What are some of the events that occur during ovulation?
What is the epithelium of the ovary?
Simple cuboidal
What are the covered parts?
What is the tunica albuginia?
Dense connective tissue layer - important in allowing the egg to leave
What is the function of the ovary?
To produce female germ cells and to synthesize and secrete steroid and peptide hormones
What are the covered parts?
What is the function of the theca interna cells?
Androgen production
What is the biological checkpoint that occurs for primordial follicle entry into the growing pool?
Oocyte complement is established when?
Established during the development of the ovary
Primordial germ cells migrate from yolk sac to gonadal ridge
What is the corpus albicans?
The remnants of a corpus luteum
What is this an image of and what are the arrows pointing at?
What is this an image of?
What is this an image of?
What is in the cortex?
Follicles containing oocytes at multiple stages of development
Corpora lutea at various stages of function and regression
What is this an image of and what is happening?
Antral follicle
Follicular fluid
Theca differentiates - externa and interna
Granulosa continues to proliferate
Increasing estradiol production
What is this an image of and what are the covered parts?
Preantral follicle
Left to right
theca LH receptors
blood supply
granulosa FSH receptors
What is this an image of?
Corpus leutum
What is this an image of?
Preantral follicle
Top to bottom
Granulosa layer
Basement membrane
Zona pellucida
Oocyte
What phase are primordial follicles arrested in?
Meiosis I
What is atresia?
Degeneration/death of the follicle and oocyte
