 In this module, as a separate, complete topic, we are going to discuss Girl Bladder and Bile. Bile is the secretion of the liver. The secretion from here comes in the bladder, which is said to be the Girl Bladder. It is associated, very close to the liver. The role of the Girl Bladder is a small bag near the liver. The Girl Bladder stores the greenish fluid, which is the bile. This is produced by the liver in a continuous manner, continuously. The bile is very alkaline and contains pigments. That is why it is a green in structure. All of these give a greenish color, tint. It contains cholesterol, lecithin, mucin, bilirubin. All these things are produced by the liver. The bile also contains salts. That acts as detergents. That acts as detergents to emulsify fats. Detergents are set to be the detergents. What they do is to dissolve the fatty material. This also acts as the detergents. Then there is the absorption of the fat. Bile salts also combine with the end product of fat. What are the end products of fat? They are fatty acids to form missiles. This becomes a new structure. Missiles are the lipid aggregates. That is fatty acids and cholesterol. With the surface coat of bile salts. This is the combination. It is something which is a structural formation. It is called as the missiles. Because they are so small, they are absorbed through the microvillage of the intestinal epithelium. Here one can see very easily. This is a missile. One part of it has been removed to show the internal structure. These are the lipids. These are the fatty acids. They are arranged in this way. This arrangement is due to the nature of fatty acids. This is a hydrophobic head. This is a hydrophilic. Because if we look at a fatty acid, it has two ends. It is a long chain fatty acid. One end is hydrophilic and the other end is hydrophobic. They are arranged in a way like this. These are the hydrophilic areas. Whereas internally, there is a hydrophobic area. This is the protein coat or missile. Missiles are lipid molecules. In fact, they are lipid molecules. They are arranged in a spherical form in aqueous solutions. Where there is water, they will arrange themselves in a way to form a ball-like structure. Which is then coated by the protein molecules. The formation of a missile is responsible to the amphipathic nature of fatty acids. Amphipathic means dual. The one end is hydrophilic and the other is hydrophobic. They contain both hydrophilic regions. There is a polar head region as well as the hydrophobic region. Which is a long hydrophobic region. This is a prerequisite for the absorption of the lipids. They enter into the microvilli or the first lacteals and then enter into the blood. This is all about the gallbladder and the bile which is produced by the liver. This is all about this module.