Principle secretory cells found in the single layer outlining the pulp (Ourtermost zone of pulp)
(A) Fibroblasts (B) Odontoblast (C) Ameloblast (D) Undifferentiated cells
(B) The outermost odontoblast layer,(Single layer outlining pulp ) contains odontoblasts as principal secretory cells for Dentin while they also secrete Collagen Type 1 and type 5 collagen fibers