A concise, clear writing style and a detailed and rich coverage of topics are the reasons that students found the first edition of the book so engaging and useful. Riding on this wave, all chapters within the second edition of this popular book have been thoroughly updated and expanded, especially the human and animal materials. A wider range of animals is covered, including dogs and cats as well as farm animals. The use of cord blood for therapy, pre-implantation genetic diagnosis and animal cloning are also explored and dealt with.