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.
Report Abuse. Some of its adaptations is first, its structre. An octopus is an invertebrate (no backbones) so that it can move easily thus escaping danger fast. Its color could also be considered as an adaptation.Most octopuses adapt their colors to their surroundings making them a hard prey and even harder to catch.It also has tentacles as its adaptive structure for protection and consumation of food.eport Abuse. Some of its adaptations is first, its structre. An octopus is an invertebrate (no backbones) so that it can move easily thus escaping danger fast. Its color could also be considered as an adaptation.