In a histology lab, the pathology slide under examination contains black residue dispersed throughout alveolar walls. What condition is present in this pathology slide?

Lung anthracosis.

Explanation:

Anthracosis may be defined as a medical condition in which the harmful pigments get accumulated in the lungs. The pigments or small substances of lipid, protein or glycogen may get accumulated in the lungs.

This condition of lung can be determined easily in the histology lab. The pathology slide under microscope shows the accumulation of black residue throughout the alveolar walls.

Thus, the answer is lung anthracosis.