As an annelid, "S. giganteus" possesses a complete digestive system and has a well-developed closed circulatory system.
It has a well-developed closed circulatory system. As an annelid, "S. giganteus" possesses a complete digestive system.
As an annelid, "S. giganteus" possesses a complete digestive system. It has a well-developed closed circulatory system.
As an annelid, "S. giganteus" possesses a complete digestive system. It has a well-developed closed circulatory system.