Reproductive system of the Polychaetes.
Polychaete worms are segmented invertebrates that have bodies consisting of two body regions: the prostomium and peristomium (the 'head' region). A segmented trunk (the 'body'). A postsegmental pygidium (the 'tail' region). They live in marine parts of the ocean but most live in the deepest part. Polychaetes may live for a few weeks or months to many years. Some breed continuously over several months, while others are restricted to spawning on a single day. Some species mate actively, with the male fertilising the eggs as they are laid and, in some cases, the fertilised eggs are then placed under the scales. In some tube-dwellers, the eggs are stuck within their tubes, or placed in the chamber below the stomach , while others lay their fertilised eggs in brood capsules.
Polychaete worms are segmented invertebrates that have bodies consisting of two body regions: the prostomium and peristomium (the 'head' region). A segmented trunk (the 'body'). A postsegmental pygidium (the 'tail' region). They live in marine parts of the ocean but most live in the deepest part. Polychaetes may live for a few weeks or months to many years. Some breed continuously over several months, while others are restricted to spawning on a single day. Some species mate actively, with the male fertilising the eggs as they are laid and, in some cases, the fertilised eggs are then placed under the scales. In some tube-dwellers, the eggs are stuck within their tubes, or placed in the chamber below the stomach , while others lay their fertilised eggs in brood capsules.