As a result, your immune system attacks healthy cells. Depending on the type, an autoimmune disease can affect one or many different types of body tissue. It can also cause abnormal organ growth and changes in organ function.There are as many as 80 types of autoimmune diseases.s a result, your immune system attacks healthy cells. Depending on the type, an autoimmune disease can affect one or many different types of body tissue. It can also cause abnormal organ growth and changes in organ function.
The diet of pelicans usually consists of fish, which can be up to 30 cm (1 ft) long, but amphibians, turtles, crustaceans and occasionally birds are also eaten. Aquatic prey is most commonly taken at or near the water surface.
1 The scientific name means âred-billed pelican.â. 2  The white pelican does not dive for its prey, it dunks its head underwater to hunt. 3  White and brown pelicans can both hold up to 3 gallons of water in their throat sac.4  Pelicans fly with their necks tucked back, unlike geese and swans.he main diet of the pelican consists of a variety of fish. They consume about 4 lbs of fish per day. Hunting as they swim, they dunk their heads under the water to catch their prey.