Widroid

Stratum (Integumentary System); stratum basale, spinosum, granulosum, lucidum and corneum

Respiratory System; The respiratory epithelium consists of conducting pathways

Lymphoid System and Cellular Immunology

Cardiovascular System, Blood, and Bone Marrow

Myelin, is produced by oligodendrocytes in the central nervous system (CNS) and by Schwann cells in the peripheral nervous system (PNS)