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.
The common octopus is a master of camouflage, changing shape and color at will. Octopuses often match their surroundings to the point of becoming invisible while motionless. To cover movements and confuse predators, they release a cloud of dark ink, called sepia, gaining time to escape. Common octopuses have an arm span of 3 meters (10 feet). Because they have no bones, octopuses can squeeze into the tiniest places. They are very intelligent. In laboratory studies, scientists have observed that the octopus can figure out mazes and puzzles.