ASTRID & HANNS-FRIEDER MICHLER / SCIENCE PHOTO LIBRARY ASTRID & HANNS-FRIEDER MICHLER / SCIENCE PHOTO LIBRARY
Uterus lining. Light micrograph of a section through the surface lining (endometrium) of a healthy human uterus. The uterus (womb) is the organ in which an embryo develops in mammals. The lining shows cyclical changes associated with egg production. Numerous blood cells are seen within the circular structures. Magnification: x25 at 35mm size.
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