Final answer:
Tight junctions are intracellular junctions that provide a watertight seal between adjacent animal cells. They prevent the leakage of materials between cells and are found in epithelial tissues. These junctions act as selective barriers, maintaining tissue integrity and function.
Step-by-step explanation:
Tight junctions are intracellular junctions that provide a watertight seal between adjacent animal cells. They prevent the leakage of materials between cells and are found in epithelial tissues that line internal organs and cavities, such as the skin and urinary bladder. These junctions play a crucial role in maintaining the integrity and function of tissues by acting as selective barriers.
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