In adults, eczema occurs most frequently on the hands and elbows, and in bending areas such as the inside of the elbows and back of the knees. In young children, eczema is often seen on the elbows, knees, face, neck, and scalp. Signs and symptoms of atopic eczema include: 1  Itchiness. 2  Skin redness.
Sphingolipids are composed of a backbone of sphingosine which is derived itself from glycerol. Sphingosine is N-acetylated by a variety of fatty acids generating a family of molecules referred to as ceramides. Sphingolipids predominate in the myelin sheath of nerve fibers.
Phospholipids are not triglycerides. There is a small but very important difference in the structure of phospholipids compared to triglycerides. Instead of having 3 fatty acids attached to the glycerol molecule, one is replaced by a phosphate group, made up of phosphorus, oxygen and hydrogen.here is a small but very important difference in the structure of phospholipids compared to triglycerides. Instead of having 3 fatty acids attached to the glycerol molecule, one is replaced by a phosphate group, made up of phosphorus, oxygen and hydrogen.