Which cells act as macrophages in the CNS?

1. These are the smallest of the glial cells. 2. They clear debris in healthy tissue. 3. Microglia are also referred to as CNS-resident macrophages. 4. So the answer is microglia. _Source: OpenStax 'Anatomy and Physiology 2e', Ch 12 'The Nervous System and Nervous Tissue'_