New type of cell found in our lungs
Researchers have discovered a new type of cell within the small air-tubes (bronchioles, which branch from the larger tubes called bronchi) of human lungs. Named respiratory airway secretory (RAS) cells, they are now understood to be crucial in sustaining healthy lungs. “Emerging technologies have only recently allowed us to sample and identify unique cell types” said Edward Morrisey, one of the lead authors of the study.
These cells have a dual function. First, they help to preserve a fluid lining in the bronchioles, to hold their structure and prevent collapse. Second, they are progenitor cells, i.e. cells which still retain some of stem cells’ ability to change into various other cell types. In this case, they can become alveolar type 2 cells. These are essential for the normal functioning of the tiny air sacs (alveoli) in the lungs, allowing efficient gas exchange.
The researchers hope that the discovery of these cells and their properties may lead to better treatments for such respiratory diseases as chronic obstructive pulmonary disease (COPD).
Such discoveries testify to deliberate design, and should give pause to those who claim to know the details of human evolutionary changes over millions of years. Researchers still don’t know everything about the human body or our complicated genetics. These cells add to a still-growing list of newly discovered purposeful parts of the human body. The Bible is clear on what the lungs are to be used for: “Let everything that has breath praise the Lord!” (Psalm 150:6).
- Basil, M.C. et al., Human distal airways contain a multipotent secretory cell that can regenerate alveoli, Nature 604:120–126, 30 Mar 2022.
- Baker, H., New part of the body found hiding in the lungs, livescience.com, 6 Apr 2022.
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