| Term | Definition |
| stratum basale | carries on mitosis - living layer - on bottom |
| stratum spinosium | spiny layers |
| stratum granulosum | contains granules pre-cursor to keratin |
| stratum lucidum | clearlayer, very thin layer of falltened dead keratinocytes |
| stratum corneum | outemost layer has keratin - waterproof |
| papillary | ridges - fingerprints |
| reticular | network, deepest layer , blood supply ofskin |
| meissners | touch and pain |
| pacinian corpuscles | pressure |
| carotene | skin color |
| sebaceous gland | greasy keeps skin pliable |
| sebum | secretion of oil glands |
| eccrine glands | produce sweat |
| apocrine glands | produce odor |
| body | visible area of nail |
| free edge | hanging off part of nail |
| lunula | white crescent |
| eponychium | cuticle |