Zoology is the branch of biology that studies the members of animal kingdom as well as their related aspects. It focuses on the constituent parts of animals, animal populations, and the interaction of animals with each other as well as with other biotic and abiotic components of the environment. The various facets studied under zoology are anatomy and morphology, taxonomy, physiology, embryology and evolutionism. Anatomy and morphology are the branches of biology which describe the internal organizations and external forms of living organisms respectively. The scientific study of naming and grouping organisms on the basis of shared characteristics is known as taxonomy. Embryology deals with the analysis of gametes, fertilization, and development stages of embryos and fetuses. Some of the diverse topics covered in this book address the varied branches that fall under this category. The topics covered in it deal with the core subjects of zoology. This book will provide comprehensive knowledge to the readers.