Signs and symptoms of the chronic phase of Chagas disease may occur 10 to 20 years after initial infection, or they may never occur. In severe cases, however, Chagas disease signs and symptoms may include: 1  Irregular heartbeat.2  Congestive heart failure. 3  Sudden cardiac arrest.4  Difficulty swallowing due to enlarged esophagus.igns and symptoms of the chronic phase of Chagas disease may occur 10 to 20 years after initial infection, or they may never occur. In severe cases, however, Chagas disease signs and symptoms may include: 1  Irregular heartbeat.
Behind the octopus's head, directly opposite the arms, is its mantle. The mantle is a highly muscled structure that houses all of the animal's organs. Its gills, hearts, digestive system and reproductive glands are all crammed into this one space.
For zoologist Mark Elgar of the University of Melbourne, Australia, an expert on invertebrate mating behaviour, the actions of the female octopuses make sense, given their eight-pronged anatomy. âThe specific method by which the female octopus captures and kills her mate â constricting him with her many legs â is novel, but only because this can be done only by an octopus,â says Elgar. Huffard agrees. Octopuses are a type of mollusc known as a cephalopod, a group that also includes squid.