· Senses.

"This series explores the foundations of human biology: structure, genetics, and diseases"--

This encyclopedia is a concise yet comprehensive guide to the systems of the human body that is accessible to the lay reader. Ligaments and lymphatic fluid. The heart and the hormone regulatory system. The respiratory and reproductive systems. The human body comprises a myriad of fascinating, complex, and efficient systems, many of which operate constantly without our knowledge or awareness—that is, until we become ill or injured. This encyclopedia provides a concise yet comprehensive introduction to each of the systems of the human body, exploring all 11 organ systems of the human body: the circulatory, digestive, endocrine, integumentary, lymphatic, muscular, nervous, reproductive, respiratory, skeletal, and urinary systems. Each chapter includes detailed descriptions of important physiological processes, cell and tissue types, as well as the organs and their roles within the larger system. Special attention is also given to the ways in which these systems interact. Written in accessible prose, this text is an easy-to-understand reference for lay readers of any age and an ideal resource for any high school health curriculum.

The author takes readers on an adventure through the human body, winding along the body's various systems and functions such as muscles, nerves, bones and joints, and blood and guts.

Learn more information about Earth’s most sophisticated machines - the human body. Encourage your child to seek further knowledge beyond the classroom. This science book can be used to review the organs and organ systems. But if you buy a copy ahead, your child can use it as advance reading material to improve grades in school. Grab a copy today.

This presentation describes various aspects of the regulation of tissue oxygenation, including the roles of the circulatory system, respiratory system, and blood, the carrier of oxygen within these components of the cardiorespiratory system. The respiratory system takes oxygen from the atmosphere and transports it by diffusion from the air in the alveoli to the blood flowing through the pulmonary capillaries. The cardiovascular system then moves the oxygenated blood from the heart to the microcirculation of the various organs by convection, where oxygen is released from hemoglobin in the red blood cells and moves to the parenchymal cells of each tissue by diffusion. Oxygen that has diffused into cells is then utilized in the mitochondria to produce adenosine triphosphate (ATP), the energy currency of all cells. The mitochondria are able to produce ATP until the oxygen tension or PO2 on the cell surface falls to a critical level of about 4–5 mm Hg. Thus, in order to meet the energetic needs of cells, it is important to maintain a continuous supply of oxygen to the mitochondria at or above the critical PO2 . In order to accomplish this desired outcome, the cardiorespiratory system, including the blood, must be capable of regulation to ensure survival of all tissues under a wide range of circumstances. The purpose of this presentation is to provide basic information about the operation and regulation of the cardiovascular and respiratory systems, as well as the properties of the blood and parenchymal cells, so that a fundamental understanding of the regulation of tissue oxygenation is achieved.