Placental specimens submitted to histology may include:
- Membrane roll: Place on edge perpendicularly to the block face to show membrane layers.
- Placental disc sections: Embed these flat and centrally located in the block face.
- Umbilical cord segments: Embed these as other tubes, on end to show the lumen (vessel) openings in cross-section.
Placenta with an umbilical cord cross section.
Membranes and umbilical cord segment.