Description: The epidermis is made up of epithelial cells depending on their location in the body. The skin that has four layers is called thin skin. While, thick skin is only found in the palms of the hand and soles of the feet. This skin is further divided into five layers from the most superficial to the deepest layer. They are the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum & stratum basale.
Function: The layers of the skin have their own individual functions. The stratum corneum helps repel water & protects you from abrasions, heat, and pathogens. The stratum lucidum is a transparent layer of keratinocytes. Stratum granulosum is where Keratin production occurs. Stratum spinosum gives the skin strength & flexibility. The stratum basale contains keratinocytes & melanocytes.
Location: The Stratum corneum is found on the top layer of the epidermis. Underneath it is the Stratum lucidum, followed by the Stratum granulosum and then the Stratum spinosum. The Stratum basale is found in the deepest layer of the epidermis.
Description: The nail is a horny plate that grows on the back of each finger and toe at its outer end. Its structure includes the nail bed, nail plate, free edge, hyponychium, nail grooves, matrix, nail mantle, lunula, cuticle (eponychium), nail walls, and perionychium.
Function: The structures of the nails have individual functions. The nail bed is to supply nourishment & protection. A nail plate is used to protect the living nail bed of the fingers & toes. The free edge protects the fingertip & the hyponychium. The hyponychium is used to protect the nail bed from infection. The nail groove is to keep the nail growing in a straight line. The matrix serves to produce new nail cells. The nail mantle is to protect the matrix from physical damage. The lunula is white in color and can be easily damaged. The cuticle is used to protect the matrix from infection. The nail wall/fold protects the nail plate edges, While the eponychium (cuticle) protects the matrix from infection.
Location: Nails are found on the fingers and toes.
Structure of five layers of the skin
Description: The epidermis is made up of epithelial cells depending on their location in the body. The skin that has four layers is called thin skin. While, thick skin is only found in the palms of the hand and soles of the feet. This skin is further divided into five layers from the most superficial to the deepest layer. They are the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum & stratum basale.
Function: The layers of the skin have their own individual functions. The stratum corneum helps repel water & protects you from abrasions, heat, and pathogens. The stratum lucidum is a transparent layer of keratinocytes. Stratum granulosum is where Keratin production occurs. Stratum spinosum gives the skin strength & flexibility. The stratum basale contains keratinocytes & melanocytes.
Location: The Stratum corneum is found on the top layer of the epidermis. Underneath it is the Stratum lucidum, followed by the Stratum granulosum and then the Stratum spinosum. The Stratum basale is found in the deepest layer of the epidermis.
Structure of the nail
Description: The nail is a horny plate that grows on the back of each finger and toe at its outer end. Its structure includes the nail bed, nail plate, free edge, hyponychium, nail grooves, matrix, nail mantle, lunula, cuticle (eponychium), nail walls, and perionychium.
Function: The structures of the nails have individual functions. The nail bed is to supply nourishment & protection. A nail plate is used to protect the living nail bed of the fingers & toes. The free edge protects the fingertip & the hyponychium. The hyponychium is used to protect the nail bed from infection. The nail groove is to keep the nail growing in a straight line. The matrix serves to produce new nail cells. The nail mantle is to protect the matrix from physical damage. The lunula is white in color and can be easily damaged. The cuticle is used to protect the matrix from infection. The nail wall/fold protects the nail plate edges, While the eponychium (cuticle) protects the matrix from infection.
Location: Nails are found on the fingers and toes.