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(a) The ovarian medulla of the mature laying hen consists of smooth muscle, collagenous connective tissue, ganglia, and large vessels. The arrow in the upper right of the image indicates simple squamous ovarian surface epithelium. H & E. 200×; (b) Section overlaps with that in (a). Masson’s trichrome stain has been applied. With this stain, smooth muscle fibers of the ovarian medulla and the arterial media are stained red and collagen tissue is stained blue 200×.
