how are protonephridia and nephridia different functionally?give example of each.
Dear Student,
- Protonephridia or flame cells are the excretory structures in Platyhelminthes (Flatworms, e.g., Planaria), rotifers, some annelids and the cephalochordate – Amphioxus.
- Nephridia are the tubular excretory structures of earthworms and other annelids.
- They differ structurally but perform excretory function.