The book contains materials characterizing the morphology of blood vessels of the olfactory brain in humans and animals. Having studied 128 hemispheres of the human brain and 467 hemispheres of the animal brain (32 representatives from 5 classes), the author presented a generalization of his own original data against the background of the achievements of world science. The information contained in the book will help in deciphering the complex relationship between the blood supply to the brain and its functions in evolutionary terms. This work will equip information about the topography and connections of the blood vessels of the olfactory brain, about the most likely options for the structure of microcirculation pathways. The book is designed for biologists, anthropologists, anatomists, physiologists, doctors.