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.
Squid vs. Octopus. Octopuses and Squids are both head-footed aquatic animals (cephalopods) but they differ in their physical characteristics, habitat and behavior. An octopus has a round head and a mantle along with eight arms. The arms are endowed with one or two rows of suckers but these never have hooks or sucker rings. Squids are also cephalopods with a triangular shaped head, a mantle and eight arms. Along with that they have two fins on their head and two tentacles.