This functional tissue unit (FTU) illustration includes cell types related to the epidermis in the ASCT+B Table Skin v1.4. Cell types and measurements were referenced from Aleemardani et al. 2021; Roig-Rosello and Rousselle 2020 and Lundström et al. 2018. Uberon describes this FTU as follows: "The grooves in the outermost layer of skin on the palms of the hands and soles of the feet where sweat glands open."

Bibliography:

• Aleemardani, Mina, Michael Zivojin Trikić, Nicola Helen Green, and Frederik Claeyssens. 2021. “The Importance of Mimicking Dermal-Epidermal Junction for Skin Tissue Engineering: A Review.” Bioengineering 8 (11): 148. https://doi.org/10.3390/bioengineering8110148.
• Lundström, Ronnie, Håkan Dahlqvist, Mats Hagberg, and Tohr Nilsson. 2018. “Vibrotactile and Thermal Perception and Its Relation to Finger Skin Thickness.” Clinical Neurophysiology Practice 3:33–39. https://doi.org/10.1016/j.cnp.2018.01.001.
• Roig-Rosello, Eva, and Patricia Rousselle. 2020. “The Human Epidermal Basement Membrane: A Shaped and Cell Instructive Platform That Aging Slowly Alters.” Biomolecules 10 (12): 1607. https://doi.org/10.3390/biom10121607.