Introduction. Silicosis is a long-term lung disease caused by inhaling large amounts of crystalline silica dust, usually over many years. Silica is a substance naturally found in certain types of stone, rock, sand and clay.Working with these materials can create a very fine dust that can be easily inhaled.ilicosis is a long-term lung disease caused by inhaling large amounts of crystalline silica dust, usually over many years.
Phospholipids are a class of lipids that are a major component of all cell membranes. They can form lipid bilayers because of their amphiphilic characteristic. The structure of the phospholipid molecule generally consists of two hydrophobic fatty acid tails and a hydrophilic head consisting of a phosphate group.
 Phospholipids are important because they are amphipathic, in other  words the two ends of the molecule are different; the fatty acids  form a hydrophobic region, whereas the phosphate is hydrophilic.o, they are called phospholipids because they are made of lipids  and phosphate group. Most phospholipids contain a diglyceride, a  phosphate group, and a simple organic mo â¦ lecule such as choline. Johnellishartford. 14,297 Contributions.