In mathematics, the Fibonacci numbers or Fibonacci series or Fibonacci sequence are the numbers in the following integer sequence: (sequence A000045 in OEIS) By definition, the first two numbers in the Fibonacci sequence are 0 and 1, and each subsequent number is the sum of the previous two.
Tight Junctions. Tight junctions are found predominantly in epithelial tissues, such as intestinal brush border. Water and other fluids must be prevented from leaking between adjacent cells, so that body fluids do not gradually seep across the intestinal lining.
1. Intercellular junctions are crucial for the development and functioning of epithelial tissues as well as endothelia. In epithelia, tight junctions (or zonula occludens) are the most apical intercellular junction and form a continuous structure that completely circumvents the cells [1] .