The epidermis the the top layer of skin composed of the stratum germinativum/stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum from innermost to outermost layer. This layer has keratinocytes for keratin production, melanocytes for pigmentation by melanin, Langerhans cells to act as macrophages for the immune system, and Merkel cells to aid in touch sensation.

The dermis is the middle layer of skin between the epidermis and the hypodermis. It has a papillary layer and a dpper reticular layer. The reteicular layer is much thicker and is 80% of the dermis. The papillary layer has Meissner's corpuscles, which are nerve pain receptors. This layer also has looping blood vessels.

The hypodermis, or subcutaneous layer, has touch receptors called pacinian corpuscles but is mainly made of areolar or fat tissue.

See the picture below to understand and recognize the model in the classroom of the layers of the skin in a squar