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.
Stratified cuboidal usually has two or three layers of cuboidal cells. This type of epithelium is largely confined to the lining of large ducts. Stratified columnar has several cell layers, the outermost of which contains columnar cells.here are three types of cell junctions found in epithelia: (1) tight junctions, which are found only in epithelia, (2) adhering junctions, and (3) gap junctions. Both adhering and gap junctions are found in other tissues as well.