These may because of the different mechanical properties (hardness, strength, flexibility) immediately adjacent tissues interact with each other, and partly mechanically damaging each other, but with no negative consequences.
Haya yanaweza Kwa sababu ya tofauti za mitambo (ugumu, nguvu, kubadilika) Mara tishu karibu kuingiliana na wengine kila kujenga, na sehemu mechanically kuharibu Kila nyingine, lakini hakuna Matokeo hasi.