STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Uterine gland. Coloured scanning electron micrograph (SEM) of a section through a tubular gland in the mucosa or endometrium that lines the uterus. Microvilli (orange, green) can be seen projecting from the gland's inner surface. The uterus is the organ in which the foetus develops. During the secretory phase of the menstrual cycle, following ovulation, the tubular gland develops and secretes glycogen. This provides the fertilized egg (ovum, not seen) with energy until it has developed a vascular link with its mother.
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