PROFESSOR P. MOTTA, DEPARTMENT OF ANATOMY, ROME UNIVERSITY / SCIENCE PHOTO LIBRARY PROFESSOR P. MOTTA, DEPARTMENT OF ANATOMY, ROME UNIVERSITY / SCIENCE PHOTO LIBRARY
False-colour scanning electron micrograph of human sperm migrating up the uterus. They are travelling across a background of uterine mucosa cells (purple, yellow) interspersed with tufts of cilia (one at right). The hair-like surface of the mucosa gives sperm a chemical protection if they are to reach and fertilize the female egg. The head of each sperm contains the human genetic material, and its whiplash tail is responsible for movement. Magnification: x2600 at 6x7cm size.
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