How do flatworms reproduce sexually?

Sexual reproduction in flatworms:

1. Flatworms fall under the phylum Platyhelminthes.
2. Platyhelminthes is another term used for flatworms.
3. Flatworms breathe through the skin.
4. They have bilateral symmetry in their body structure.
5. A specialized respiratory system, skeleton system, circulatory system, or complex reproductive system seem to be absent in Platyhelminthes.
6. Hence, they are soft-bodied invertebrates.
7. Platyhelminthes produce both eggs and sperms, hence these organisms are known as hermaphrodites.
8. They can reproduce via sexually or asexually.
9. During sexual reproduction the sperm of one flatworm fertilized the egg of another flatworm, resulting in cross-fertilization.
10. The fertilization process in flatworms is internal.
11. The zygote develops through many larval stages.