SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY
Eye muscle, coloured scanning electron micrograph (SEM). This is one of the rectus muscles of the eye. These muscles control the movement of the eyeball within the orbit (the eye socket). The strands are the muscle fibres that are grouped together to form the structure of the muscle. At top are strands of connective tissue.
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