Print this article Print all entries for this topic Cite this article. By puberty the number of primary oocytes has further declined to about , The mucous secreting cells are sometimes called peg cells because their nuclei look like a peg that has been pushed into the epithelia thus, they are not as near to the base of the epithelium as are the nuclei of the the ciliated cells. The antrum contains fluid which is rich in hyaluronan and proteoglycans. Although this further development can already take place sporadically in the time before birth and up to puberty, the main part occurs as soon as a regular hormonal cycle is established. The theca cells are in a better position to catalyze the initial steps in estrogen synthesis because they are closer to blood vessels and can take up LDL to obtain cholesterol. The e pithelium that forms the glands and lines the canal is simple columnar, mucous secreting cells.
These organs include the ovary and uterus, and the histological changes in these organs are driven largely by four hormones: From the uterine lumen outward they are as follows:. During the ovulation, the mucus is less viscous and more watery — that facilitates the penetration of sperm. It and the oviduct uterine tube also serve as an input pathway for sperm vaginal and uterine tracts. Progesterone stimulates glands to produce glycoproteins.
Ovary and Follicle Development
A combination of hormonal and enzymatic effects is responsible for the release of the secondary oocyte in the middle of the menstrual cycle — on the 14th day of a day cycle. The gestational also called menstrual age of pregnancy means that the the initiation of pregnancy is the first day of the last normal menstrual period LMP. The epithelial cells are pale staining as they are actively secreting a mucous rich in nutrients to feed the nascent being. Pelvic MRI Ovarian follicles as well as follicular cysts may be seen as rounded structures around the ovary. There is some ill-defined difference in stromal texture between cortex and medulla, but the main distinction is that the cortex includes all of the ovarian follicles while the medulla contains the larger blood vessels. During the uterine contraction, all three layers work together as a functional syncytium.
The surface is covered by skin. Each follicle contains a single oocyte, which is surrounded by one or more layers of follicle cells. Slide 78 is a section from a non-lactating mammary gland. Without hormonal stimulation primarily somatomammotropin and prolactin the adult mammary tissue is made mostly of ducts, fat and connective tissue. After the release of the ovum, the remains of follicle convert into the corpus luteum which produces progesterone and prepares the reproductive organs for pregnancy. The first meiotic division is now completed, and the oocyte is now a secondary oocyte, and starts its second meiotic division. The wall of the uterine tube is composed of three layers: