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Tissue respiration

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Proceedings of the 32nd scientific meeting of the International Society on Oxygen Transport to Tissue (ISOTT) in Bari, Italy, August 21-26, 2004.

Oxygen --- Tissue respiration --- Physiological transport --- Chalcogens --- Nonmetals --- Photosynthetic oxygen evolution

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Tissue respiration --- Congresses --- Oxygen --- Physiological transport --- Tissue respiration - Congresses. --- Oxygen - Physiological transport - Congresses. --- BIOLOGICAL TRANSPORT --- OXYGEN --- OXYGEN CONSUMPTION --- SPECTROPHOTOMETRY, INFRARED --- BLOOD --- PHYSIOLOGY

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Tissue respiration --- 57.017.72 --- 591.12 --- 612.2 --- 612.2 Respiration. Breathing. Respiratory system --- Respiration. Breathing. Respiratory system --- 591.12 Respiration. Breathing --- Respiration. Breathing --- 57.017.72 Respiration --- Respiration --- Oxidation, Physiological --- Tissue metabolism --- Tissue respiration.

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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 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 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.

Tissue respiration. --- Oxygen --- Tissue metabolism. --- Oxygen Consumption. --- Physiological transport. --- Cardiovascular system --- Respiratory system --- Blood --- Microcirculation --- Oxygen transport