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This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1904 edition. Excerpt: ... CHAPTER XI THE NERVOUS SYSTEM Parts of the nervous system.--The nervous system is composed of five important parts, (i) One large nerve-centre--the brain. (2) A long nerve-centre in the spinal column--the spinal cord. (3) Many small nerve-centres--the ganglia--found at many places in the body. (4) The nerves which run from the nerve-centres out to every part of the body. (5) Nerve endings, as where a nerve ends in a muscle or gland. The nerve-cell.--The nervous system is composed of cells just as other parts of the body are, but they are quite different in shape. A nerve-cell in the spinal cord may have to control a cell of muscle in the hand. It must then be able to reach all the way from the cord to the hand. So we find that most nerve-cells have long branches running out from them. 14 209 As a rule, there is only one very long branch and a number of small ones. In Fig. 68 you can see the parts of a nerve-cell. It has a body and a nucleus, and is composed of the same kind of material as the other cells; but it is different in having the long branch that may reach out two or three feet from the body of the cell to another cell over which it has control. When we use any of the skeletal muscles, we must first send an order out on the long branches of the nerve-cells to the muscle-cells. When a large number of these cells are clustered together they are called a nervecentre, and a number of the long branches bound together are called a nerve. All the nerve-centres are in the brain, the spinal cord, and the ganglia. Everything we do and every movement we make starts in the nerve-centres. The brain.--The brain is the most important part of the human body. It is very delicate and easily injured, and so we find it well protected. It is...
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Intricate details of all aspects of the human body down to the smallest detail - from our cells and DNA, to the largest bone in our bodies, the femur. 3D generated illustrations and medical imaging provide a close look at the body's forms and functions in physiology and anatomy, showing how the body works and its amazing systems and abilities. To understand our modern human bodies, this book first looks at our ancestors and how the evolution of Homo Sapiens shaped our anatomy. This gave us the ability to walk tall, create language, and make tools with our incredibly adapted apposable thumbs. Learn how we can see evolution in our DNA, and the functions of DNA. Read about the things you can only see with microscopes and other special imaging machines, like cell structure, motor pathways in the brain, and the inner iris. All these many parts work together to make the human body. The physiology of our body is written in clarifying detail. Learn about the organs and systems that operate within, such as the cardiovascular, digestive, and neural systems. See our elegant anatomy and read how the skeleton, muscles, and ligaments operate to allow movement. This second addition has included more detail on the joints in the hands and feet. The Complete Human Body takes you from infancy to old age showing how our body grows and changes, and what can go wrong. 2nd Edition: Enhanced and Updated This visual guide uses remarkable illustrations and diagrams to let you peek inside our complex and astounding bodies. It has been written in an easy-to-follow format, with straightforward explanations to give you the best overview of the many things that make us human. Suitable for young students who want an extra resource for school, people working in medical fields, or for anyone with a keen interest in human biology. Inside the body of the book: - The Integrated Body - Anatomy - How the Body Works - Life Cycles - Diseases and Disorders
Human Anatomy, Media Update, Sixth Edition builds upon the clear and concise explanations of the best-selling Fifth Edition with a dramatically improved art and photo program, clearer explanations and readability, and more integrated clinical coverage. Recognized for helping students establish the framework needed for understanding how anatomical structure relates to function, the text's engaging descriptions now benefit from a brand-new art program that features vibrant, saturated colors as well as new side-by-side cadaver photos. New Focus figures have been added to help students grasp the most difficult topics in anatomy. This updated textbook includes access to the new Practice Anatomy Lab(tm) 3.0 and is also accompanied by MasteringA&P(tm), an online learning and assessment system proven to help students learn. In addition to providing instructors and students with access to PAL 3.0, MasteringA&P for Marieb's Human Anatomy Media Update, also features assignable content including: quizzes and lab practicals from PAL 3.0 Test Bank, activities for A&P Flix for anatomy, art activities, art questions, chapter test questions, reading quiz questions, clinical questions, and Test Bank from the textbook.