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.
Pelagic sharks are carnivorous and eat fish, including other sharks on occasion, turtles, seals and penguins. The 3 largest species of pelagic shark â the whale shark, the basking shark and the megamouth shark â are all filter feeders and eat mainly plankton. Reproduction. Most pelagic sharks are viviparous - the eggs are fertilized inside the female's body, and live 'pups' are hatched.