INNERSPACE IMAGING / SCIENCE PHOTO LIBRARY INNERSPACE IMAGING / SCIENCE PHOTO LIBRARY
Bone growth. Light micrograph of actively growing cells in the growth plate of a long bone. Across the head of a bone is a region of hyaline cartilage cells called the epiphyseal plate. Here, columns of cartilage cells (chondrocytes, from upper left to bottom right) divide, enlarge and eventually die. The cartilage matrix is replaced with bone formed from osteoblast cells. This process is known as ossification and it serves to increase the length of the shaft (diaphysis) of long bones. The junction between cartilage and bone is called the metaphysis. Magnification: x170 when printed 10cm wide.
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