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.
Cell Junctions. There are three major types of cell junctions: anchoring junctions, tight junctions, and gap junctions. They consist of protein complexes and are found in various tissues of vertebrates, especially muscles and epithelial tissues. Cell junctions are made from proteins called cell adhesion molecules, which are signal receptors in the cell membrane.