THE SKELETAL SYSTEM: Frameworks for Life

Backing up their Muscular System, above, the Silversteins perform a similarly workmanlike job on the cells, structure, development, and workings of the bones. Surveyed also are the production of blood cells in the marrow (with a discussion of the effects of atomic radiation) and the processes of bone breaks and recovery (with recent findings on how electric current helps in healing). Animal skeletons are considered in terms of analogous (birds' wings and insects' wings) and homologous (birds' wings and human arms) structures, and a final chapter examines fossilized bones as ""clues to the past."" Solidly and smoothly articulated.