Cardiovascular System, Red Blood Cells, and Oxygen Transport in Microgravity

Cardiovascular System, Red Blood Cells, and Oxygen Transport in Microgravity PDF

Author: Hanns-Christian Gunga

Publisher: Springer

Published: 2016-07-14

Total Pages: 74

ISBN-13: 3319332260

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This book comprehensively describes the physiological changes and consequences that occur in humans during spaceflight. It specifically presents the adaptations of the cardiovascular and the respiratory system. Specific changes occurring after 10, 20 or more days in space are depicted. Furthermore, the book explains various effective countermeasures that are required upon return of the astronauts to Earth. The book is a must-have for all biomedical and clinical researchers in the field of cardiovascular biology and respiration, and a fascinating reading for all interested laymen, who wish to understand a bit more about spaceflight research and technology.

Regulation of Tissue Oxygenation, Second Edition

Regulation of Tissue Oxygenation, Second Edition PDF

Author: Roland N. Pittman

Publisher: Biota Publishing

Published: 2016-08-18

Total Pages: 117

ISBN-13: 1615047212

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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.

The Circulatory System, Third Edition

The Circulatory System, Third Edition PDF

Author: Donna Bozzone

Publisher: Infobase Holdings, Inc

Published: 2021-08-01

Total Pages: 96

ISBN-13: 164693718X

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Composed of the heart, blood vessels, and blood, the circulatory system delivers oxygen and nutrients to every tissue in the body. At the center of this incredibly complex system is the heart, a strong muscle that continuously pumps blood throughout the body. Striving to promote a basic understanding of the fundamental physical and biological principles underlying circulatory functions, The Circulatory System, Third Edition describes the anatomical features of the system and examines how it responds to a broad range of challenges, such as increased activity, the microgravity of space, and hemorrhage. Packed with full-color photographs and illustrations, this absorbing book provides students with sufficient background information through references, websites, and a bibliography.

Regulation of Tissue Oxygenation

Regulation of Tissue Oxygenation PDF

Author: Roland Pittman

Publisher: Biota Publishing

Published: 2011-03-01

Total Pages: 102

ISBN-13: 1615041788

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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 PO in their vicinity falls to a critical level of about 1 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 PO. 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. Table of Contents: Introduction / The Circulatory System and Oxygen Transport / The Respiratory System and Oxygen Transport / Oxygen Transport / Chemical Regulation of Respiration / Tissue Gas Transport / Oxygen Transport in Normal and Pathological Situations: Defects and Compensations / Matching Oxygen Supply to Oxygen Demand / Exercise and Hemorrhage / Measurement of Oxygen / Summary / References / Biography

Regulation of Coronary Blood Flow

Regulation of Coronary Blood Flow PDF

Author: Michitoshi Inoue

Publisher: Springer Science & Business Media

Published: 2013-11-09

Total Pages: 330

ISBN-13: 4431683674

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Research centering on blood flow in the heart continues to hold an important position, especially since a better understanding of the subject may help reduce the incidence of coronary arterial disease and heart attacks. This book summarizes recent advances in the field; it is the product of fruitful cooperation among international scientists who met in Japan in May, 1990 to discuss the regulation of coronary blood flow.

Spaceflight Associated Neuro-Ocular Syndrome

Spaceflight Associated Neuro-Ocular Syndrome PDF

Author: Andrew G. Lee

Publisher: Academic Press

Published: 2022-07-16

Total Pages: 242

ISBN-13: 0323915256

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Prolonged microgravity exposure during long-duration spaceflight (LDSF) produces unusual physiologic and pathologic neuro-ophthalmic findings in astronauts. These microgravity-associated findings collectively define the Spaceflight Associated Neuro-ocular Syndrome (SANS). In this book, the editors compare and contrast prior published work on SANS by the National Aeronautics and Space Administration’s (NASA) Space Medicine Operations Division with retrospective and prospective studies from other research groups. The book describes the possible mechanisms and potential etiologies for SANS, and provides an update and review on the clinical manifestations of SANS including: unilateral and bilateral optic disc edema, globe flattening, choroidal and retinal folds, hyperopic refractive error shifts, and focal areas of ischemic retina (i.e., cotton wool spots). The ocular imaging findings (e.g., retinal nerve fiber layer, optic disc, and choroidal changes on optical coherence tomography) of SANS is also described, including the intraorbital and intracranial findings on orbital ultrasound and magnetic resonance imaging. The knowledge gaps for in-flight and terrestrial human research including potential countermeasures for future stud is also explored, including reports on the in-flight and terrestrial human and animal research being investigated by NASA and its partners to study SANS both prospectively and longitudinally and in preparation for future long duration manned missions to space including the moon, the asteroid belt, or Mars. We think this is a unique topic and hope that NASA and its research partners continue to study SANS in preparation for future longer duration manned space missions. Written in an easy-to-read manner, the book adopts a translational approach and explores the science and the clinical manifestations of Space flight associated neuro-ocular syndrome. It is also multi-disciplinary and suitable for both clinicians and researchers in ophthalmology, neurology, and aerospace medicine interested in SANS SANS is a unique space flight disorder that has no terrestrial equivalent. The book involves contributions from international experts across multiple disciplines to tackle the problem of SANS Summarizes and reviews the current findings of SANS, including possible mechanisms and potential etiologies, clinical manifestations, current reports on the in-flight and terrestrial human and animal research, and ocular imaging findings

Basic Physiology for Anaesthetists

Basic Physiology for Anaesthetists PDF

Author: David Chambers

Publisher: Cambridge University Press

Published: 2019-07-25

Total Pages: 469

ISBN-13: 1108463991

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Easily understood, up-to-date and clinically relevant, this book provides junior anaesthetists with an essential physiology resource.

Vascular Biology of the Placenta

Vascular Biology of the Placenta PDF

Author: Yuping Wang

Publisher: Biota Publishing

Published: 2017-06-23

Total Pages: 126

ISBN-13: 1615047514

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The placenta is an organ that connects the developing fetus to the uterine wall, thereby allowing nutrient uptake, waste elimination, and gas exchange via the mother's blood supply. Proper vascular development in the placenta is fundamental to ensuring a healthy fetus and successful pregnancy. This book provides an up-to-date summary and synthesis of knowledge regarding placental vascular biology and discusses the relevance of this vascular bed to the functions of the human placenta.

A Strategy for Research in Space Biology and Medicine in the New Century

A Strategy for Research in Space Biology and Medicine in the New Century PDF

Author: National Research Council

Publisher: National Academies Press

Published: 1998-09-16

Total Pages: 296

ISBN-13: 0309173701

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Construction of the international space station, scheduled to start in late 1998, ushers in a new era for laboratory sciences in space. This is especially true for space life sciences, which include not only the use of low gravity as an experimental parameter to study fundamental biological processes but also the study of the serious physiological changes that occur in astronauts as they remain in space for increasingly longer missions. This book addresses both of these aspects and provides a comprehensive review of ground-based and space research in eleven disciplines, ranging from bone physiology to plant biology. It also offers detailed, prioritized recommendations for research during the next decade, which are expected to have a considerable impact on the direction of NASA's research program. The volume is also a valuable reference tool for space and life scientists.