1 Aden, Yemen is at 12 49'N, 45 1'E, 3 m (10 ft). 2  See map. 3  Aden has a subtropical desert / low-latitude arid hot climate (K ppen-Geiger classification: BWh). 4  The annual average temperature is 29.2 degrees Celsius (84.5 degrees Fahrenheit).
The core of a sphingolipid is an amino alcohol called sphingosine. Complex sphingolipids located in the plasma membrane of animal cells (especially nerve cells) have a structural function and are believed to protect the cell surface from harmful environmental factors.
Phospholipids are the main constituents of cell membranes. Their function as the principle components of cell membranes makes phospholipids essential for all vital cell processes. Phospholipids are the most important membrane building compounds that occur in human, animal and plant cells.All biological membranes consist primarily of phospholipids and proteins. Phospholipids are amphophilic molecules with unique physicochemical properties.hospholipids are the most important membrane building compounds that occur in human, animal and plant cells. All biological membranes consist primarily of phospholipids and proteins. Phospholipids are amphophilic molecules with unique physicochemical properties.