Gynecology . Fig. 10.—Graafian power. Three follicles are seen which are in the earliest stages. The center one hasbegun to show proliferation of the cells. These cells were originally derived from the germinal epi-thelium covering the ovary. No ova are seen. At the same time that these changes are going on inside the follicle, it isbeing surrounded on the outside by a concentric envelope of connective tissue,termed the theca folliculi. This envelope is plainly divided into two layers,that lying farthest away from the follicle being termed the tunica or theca ex-terna, and that l
Gynecology . Fig. 10.—Graafian power. Three follicles are seen which are in the earliest stages. The center one hasbegun to show proliferation of the cells. These cells were originally derived from the germinal epi-thelium covering the ovary. No ova are seen. At the same time that these changes are going on inside the follicle, it isbeing surrounded on the outside by a concentric envelope of connective tissue,termed the theca folliculi. This envelope is plainly divided into two layers,that lying farthest away from the follicle being termed the tunica or theca ex-terna, and that lying next to the follicle being called the tunica or theca tunica externa is thick and dense and consists of circularly arrangedconnective-tissue fibers. It contains the blood- and lymph-vessels that supply PHYSIOLOGY OF THE UTERUS AND OVARIES 35 imh. ?«&Bm
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