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.
Types of Hernia. Approximately 80 percent of all hernias are inguinal---or groin---hernias, which most frequently occur in adult men. Other types are umbilical, usually occurring in infants, incisional, which occur following surgery, and hiatal, where part of the stomach enters the chest cavity through the esophagus.atients are placed under general anesthesia, the tissue is pushed back through the opening, and the abdominal wall is repaired. Surgeons may use a traditional hernia repair method or laparoscopic surgery.