Drawing of a protoplasmatic astrocyte, a kind of glial brain cell. They appear mostly in the grey matter. The cells enclose the blood vessels with their processes but do not touch them with their bodies.
Typical for protoplasmatic Astrocytes are their thick, branched processes (in contrast to fibrillary Astrocytes that have thin only lightly branched processes). A strong nucleolus is visible inside the cells nucleus.
The picture was treated with a sepia filter to affect the coloration that was typical for histological drawings of the beginng 20th century. It is equivalent to the presantation that results from silver impregnation (Golgi-coloration).