106k views
4 votes
Explain the relationship between
anatomic dead space and physiologic dead space.

User Davey
by
8.1k points

1 Answer

5 votes

Final answer:

Anatomic dead space and physiologic dead space are regions in the lungs that do not participate in gas exchange. Anatomic dead space pertains to air that doesn't reach the alveoli, while physiologic dead space includes alveoli with air that can't exchange gases due to functional problems. The total dead space is the combination of both, affecting overall breathing efficiency.

Step-by-step explanation:

The relationship between anatomic dead space and physiologic dead space involves their contributions to areas in the lungs that do not participate in gas exchange. Anatomic dead space consists of air-filled areas of the respiratory system, such as the trachea and bronchi, where oxygen and carbon dioxide cannot be exchanged because the air does not reach the alveoli. In contrast, physiologic dead space refers to areas where gas exchange is impaired despite the presence of the air within the alveoli, typically due to issues like poor blood flow or non-functioning alveolar tissue.

Causes of physiologic dead space can vary, including issues such as puncture wounds which cause leaks in lung tissue, reduced neurotransmitters affecting electrical stimulation of lung tissue, or alveoli failing to receive adequate blood flow. In the case of disease, blockages, or abnormalities in lung structure, both types of dead space can contribute to decreased oxygen levels in the blood and elevated carbon dioxide levels, thereby impacting breathing efficiency.

Total dead space is the sum of anatomic dead space and alveolar dead space together, encompassing all the air in the respiratory system that is not being used in the gas exchange process.