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.
Given the wide distribution, epithelial cells perform a variety of functions: protection (skin), absorption (intestine), secretion (glands), excretion (kidney), gas exchange (lung and blood vessels). To perform these functions, epithelia assemble into different structures. List the junctional complexes that hold epithelial cells together and their primary functions. 2  List the functions of the basement membrane and how epithelial cells attach to the basement membrane.