Physiological dead space
Physiological Dead Space
Physiological dead space (pronunciation: fiz-ee-uh-loj-i-kuhl ded speys) is a term used in respiratory physiology to describe the portion of each breath that does not participate in gas exchange. It is the sum of the anatomical dead space and alveolar dead space.
Etymology
The term "physiological dead space" is derived from the Greek word "physiologia" meaning 'study of nature, origins', and the English word "dead space", which refers to a space where nothing is happening or can happen.
Definition
Physiological dead space refers to the volume of a breath that does not participate in gas exchange. It is composed of two parts: the anatomical dead space, which is the volume of the conducting airways, and the alveolar dead space, which is the volume of the alveoli that are ventilated but not perfused.
Related Terms
- Anatomical Dead Space: The volume of the conducting airways, which does not participate in gas exchange.
- Alveolar Dead Space: The volume of the alveoli that are ventilated but not perfused.
- Respiratory Physiology: The branch of physiology concerned with the processes of respiration.
- Gas Exchange: The process by which oxygen is transported to cells and carbon dioxide is transported from cells.
See Also
External links
- Medical encyclopedia article on Physiological dead space
- Wikipedia's article - Physiological dead space
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