zonula

Example:The zonula occludens is an essential component of the tight junctions that form the paracellular barrier in the small intestine.

Definition:A type of cell-cell junction that forms a continuous ring around the boundaries of adjacent cells, which serves to seal the paracellular space and prevent the passage of solutes and water between cells.

Example:The zonula adherens is critical for maintaining the structural integrity of epithelial tissues and preventing their separation.

Definition:A cell-cell junction that connects adjacent cells using intermediate filaments and actin filaments, providing them with structural and mechanical integrity.