S-shaped Body Cells (SSB)

The S-shaped body (SB) stage can be divided into distinct proximal, medial, and distal segments, with respect to the position of the adjacent uriteric bud tips. The proximal segment is further organized into two distinct epithelial layers, namely, the parietal (Bowman’s capsule) and visceral (podocyte) layers, which, together with invading endothelial and mesangial cells, form the renal corpuscle.