A Practical Physiology by Albert F. Blaisdell is a comprehensive textbook that covers the basic principles of human physiology. The book is designed to provide students with a practical understanding of the functioning of the human body, including the structure and function of organs and systems. The book is divided into several sections, each of which focuses on a specific aspect of physiology. Topics covered include the nervous system, the cardiovascular system, the respiratory system, the digestive system, and the endocrine system. Each section includes detailed descriptions of the anatomy and physiology of the system, as well as practical applications and examples.The book is written in a clear and concise style, making it easy for students to understand complex concepts. It is also filled with helpful illustrations, diagrams, and tables that help to reinforce key concepts and make learning easier. Overall, A Practical Physiology is an essential resource for students of physiology, as well as for anyone interested in learning more about the functioning of the human body.We have just learned that the pitch of sound depends on the rapidity of the vibrations. This depends on the length of cords and their tightness for the shorter and tighter a string is, the higher is the note which its vibration produces. The vocal cords of women are about one-third shorter than those of men, hence the higher pitch of the notes they produce. In children the vocal cords are shorter than in adults. The cords of tenor singers are also shorter than those of basses and baritones. The muscles within the larynx, of course, play a very important part in altering the tension of the vocal cords.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.
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