1 Amphibians tend to be very pollution sensitive due to the fact that they absorb chemicals in the water through their skins; this is one reason why many amphibian populations are in distress today. 2  With addition of detergents to the eco-system, insects that normally have the ability to walk on water will be unable to.ther organisms are highly tolerant to pollution of their environments, among these are aquatic worms, leeches, and snails. As a rule, as complexity increases, tolerance to pollution decreases.
Hiatal hernias occur when part of the stomach slides through the opening in the diaphragm where the esophagus passes from the chest into the abdomen. A sliding hiatal hernia is the most common type and occurs when the lower esophagus and portions of the stomach slide through the diaphragm into the chest. Paraesophageal hernias occur when only the stomach herniates into the chest alongside the esophagus.
There are two main types of hiatal hernias: sliding and paraesophageal (next to the esophagus). In a sliding hiatal hernia, the stomach and the esophagus slide up into the chest through the hiatus. This is the more common type of hernia. Generally, sliding hiatal hernias pose no threat to a person's health unless you develop symptoms of GERD. Paraesophageal hernias are less common but are more cause for concern.