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.
They can swallow fish weighing up to 1.85 kg (4.1 pounds). Pelicans can fly up to 200 km (120 mi) daily, from their colonies to the feeding areas. Because pelican excrements are acid, they destroy the reed beds or the trees around, and pelican colonies must be relocated once every couple of years. 5. Only the brown pelicans of the Americas live at sea and dive for fish.