however , 48 h after application , the tpa-treated epidermis was very similar to fetal epidermis , i.e. , high volume density of nuclei ribosomes , rough endoplasmic reticulum , membrane-coating granules , and keratohyalin granules , and low volume density of bundled filaments in the upper layers .
C0035553
ribosomes
C0230779
rough endoplasmic reticulum