Answer:
Gap junction
Step-by-step explanation:
They are also called nexus or Macula communicans
These are specialized inter-cellular connections between a group of cells that directly connects the cytoplasm of two cells allowing passage of small molecules, ion and electric impulses.
They occur in almost all cells except sperm cell, erythrocytes and fully developed skeletal muscles. Gap junction are not found in simpler organisms such as sponges and slime molds.