PROF. P. MOTTA / DEPT. OF ANATOMY / UNIVERSITY "LA SAPIENZA", ROME / SCIENCE PHOTO LIBRARY PROF. P. MOTTA / DEPT. OF ANATOMY / UNIVERSITY "LA SAPIENZA", ROME / SCIENCE PHOTO LIBRARY
False-colour scanning electron micrograph (SEM) of the internal wall of the uterus, the endometrium, during the secretory phase. The endometrium consists of a ciliated epithelium, yellow at top centre, supported by a connective tissue stroma (purple) which contains many tubular glands. These glands have produced the yellow-orange granules of mucus, composed of proteins and sugars, which represent the nutritive elements for a possible fertilised ovum. The secretory phase is triggered during the ovarian cycle by the hormones oestrogen and progesterone which are secreted by the ovary. Magnification: x1285 at 6x7cm size.
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