Question

The drawing shows the internal anatomy of a sponge. What does the arrow in the middle represent?

Answer 1

Without the specific drawing, it is difficult to determine the exact meaning of the arrow in the middle. However, in a general context, an arrow in a drawing of the internal anatomy of a sponge could represent the flow of water. Sponges are filter-feeding animals that constantly pump water through their bodies to filter out microscopic food particles. This continuous water flow is essential for their survival. Therefore, an arrow in the drawing could indicate the direction of water movement through the sponge.