Post-COVID pulmonary fibrosis, which involves scarring of the lungs that can worsen over time and may require a lung transplant, affects some patients after infection, according to pulmonologists.

These three features are particularly important to our lungs for efficient gas exchange. Most of them also apply to other exchange surfaces such as the small intestine, body tissues and placenta.

Spongy mesophyll close spongy mesophyllThe plant tissue in a leaf which has loosely packed cells and air spaces between them to allow gas exchange. tissue is packed loosely for efficient gas exchange.

A new study suggests that understanding resilience--the ability of injured lung tissue to heal and regenerate ... a surface area large enough for gas exchange," said Jennifer Sucre, MD, associate ...