The distinct circular structures (seminiferous tubules) are composed of multiple layers of cells, and there is little other tissue between them (unlike ovarian tissue, for example). The lumen of the tubules do not have any intruding structures (as seen in kidney or ovary slides). It is probably just coincidence that the male reproductive tissue is stained blue while the female tissues are stained pink.
The wispy material barely visible inside the lumen of the seminiferous tubules are immature spermatozoans - sperm cells (5).
The most distinctive feature of the ovary are the large circular Graafian follicles (4), lined with stratified cuboidal cells and with a central empty-appearing region (antrum). In most of these follicles, there will be a single large oocyte (5), also surrounded by a couple of layers ofepithelium.
Identify the 4 developmental stages of the ovarian follicle. However, since these stages are really just points along a continuum of development, some follicles may be difficult to categorize.
The inner lining of the uterus is much thicker than most other hollow organs examined so far. Note in particular, the extensive glandular layer (endometrium) with numerous uterine glands (1).
Be able to distinguish the endometrium (E), which is loaded with glands (1) and lines the lumen, from the muscular, gland-less myometrium (M). The boundary between the endometrium and myometrium is indicated by the solid line in the figures below.
Note the uterine glands (1) are smoothly rounded or oval.
Note that the uterine glands (1) are very irregular in shape, with zig-zagging edges.
The uterine lining bordering the lumen is irregular and sloughing off - note the loose
cells. The glands are much less evident in this stage.