in monolayers , the cells form mosaic-like borders , and retain many ultrastructural features characteristic of rete epithelial cells in situ , including an indented nucleus with prominent heterochromatin clumps , short rod-shaped or round mitochondria that are easily distinguished from the elongated mitochondria of sertoli cells , the presence of desmosomes , and few if any lipid droplets or vacuoles .
C0007610
nucleus
C0019397
heterochromatin