STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Bone tissue. Scanning electron micrograph (SEM) of cancellous (spongy) bone. Bone tissue can be either cortical (compact) or cancellous. Cortical bone usually makes up the exterior of the bone, while cancellous bone is found in the interior. Cancellous bone is characterised by a honeycomb arrangement, comprising a network of trabeculae (rod-shaped tissue). These structures provide support and strength to the bone. The spaces within this tissue contain bone marrow (not seen), a blood forming substance. Human tissue. Magnification: x10 when printed 10cm wide.
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