Assertion: circulatory system's capillary | /r/LocatedNear | microscopic blind-ended sacks
Facets:
value: in the lungs
type: LOCATION
Source sentences:
text: While passing through tiny capillaries that surround the microscopic blind-ended sacks in the lungs (called the alveoli), the RBCs drop off carbon dioxide to be exhaled and attach oxygen molecules to the hemoglobin complexes within the cell.