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.

Audisee® eBooks with Audio combine professional narration and text highlighting for an engaging read aloud experience! The circulatory system is made up of the heart, the blood, and strong tubes called blood vessels. But what does the circulatory system do? And how do its parts work together to keep your body healthy? Explore the circulatory system in this engaging and informative book.

Describes the anatomy and functions of the human circulatory system and how it responds to increased activity, the microgravity of space, and other changes.

This book includes 10 lectures in a light, entertaining style, witheach "lecture" building on the previous one - making it easy forthe reader to comprehend the vastly complicated functions of thecirculatory system. The length of the text has intentionally been kept short; it isneither exhaustively complete nor over-simplified. It is enrichedby details about basic biologic mechanisms and clever ways naturehas solved a problem or achieved a result.

Text and images describe the circulatory system.

Developed by a pediatrician, this book focuses on the amazing design and functionality of the human body’s circulatory system. You will discover amazing facts like: The human heart beats 100,000 times a day, and one drop of blood has 5 million red blood cells in it A timeline of important discoveries and innovators as well as key anatomical terms and concepts Discussions of disease and proper care for optimal health! The third book in the popular elementary anatomy series God’s Wondrous Machine, focuses on the heart, blood, and blood vessels that make up the body’s circulatory system. Understanding the mechanics of this system in transporting nutrients, blood, chemicals, and more to cells within the body is key to understanding how it helps fight disease as well as maintain a properly balanced temperature. Readers learn how the deliberate design of their bodies enables it to function as it should, just as God meant for it to.

Discusses the circulatory system and ways to keep your heart healthy, and shows a map of blood's route around the body.