<Tr> <Td> Zone of maturation and hypertrophy </Td> <Td> Chondrocytes stop mitosis, and begin to hypertrophy by accumulating glycogen, lipids, and alkaline phosphatase </Td> </Tr> <Tr> <Td> Zone of calcification </Td> <Td> Chondrocytes undergo apoptosis . Cartilagenous matrix begins to calcify . </Td> </Tr> <Tr> <Td> Zone of ossification </Td> <Td> Osteoclasts and osteoblasts from the diaphyseal side break down the calcified cartilage and replace with mineralized bone tissue . </Td> </Tr> <P> A mnemonic for remembering the names of the epiphyseal plate growth zones is "Real People Have Career Options," standing for: Resting zone, Proliferative zone, Hypertrophic cartilage zone, Calcified cartilage zone, Ossification zone . The growth plate is clinically relevant in that it is often the primary site for infection, metastasis, fractures and the effects of endocrine bone disorders . </P>

Epiphyseal plates are made of what kind of bone