Labels:book | bulletin board | finger | plaything | trade name | tree OCR: How Do YOUR BONES GROW? HEN BABY is in its mother's uterus, tough, flexible material called cartilage begins to form W here harder bones ev ventually grow As the baby grows, cartilage Where growth occurs IS continually replaced with bone in takes process place in called the shafts ossification. and This heads head Bone of all bones Once hardened, your bones continue to lengthen until you are about 20 years old. INFANT The bones of a four-year- P[O- infant Bone are constantly getting longer. shaft Ossification is taking place in the shafts and heads of all the hand bones: both the long finger and palm Wrist bones bones, and the short Wr iS bones How the bones in BABY INFANT ODOLESCENT ADULT your hand develop eventually continuall ESCENT
