Ventricular septal
1957
From the collection of Leiden University Libraries
1957
From the collection of Leiden University Libraries
This sketch shows two open animal hearts. One heart is cut open from the front, the other from the side. You can see the dark insides and some lines marking parts inside. The drawing is simple, with light shading and a few quick strokes. The artist focused on showing how the inside looks. The lines help you spot the main areas without extra details. Want to see more? Look up cross-hatching to see how artists use lines to create shadows.
