MICROANATOMY

Detailed explanation-1: -Keratinocytes produce keratin, a tough, protective protein that makes up the majority of the structure of the skin, hair, and nails. The squamous cell layer is the thickest layer of the epidermis, and is involved in the transfer of certain substances in and out of the body.

Detailed explanation-2: -The newly formed cells move up through the epidermis toward the skin surface, while producing a tough, fibrous protein called keratin. The cells become filled with keratin and die by the time they reach the surface, where they form a protective, waterproof layer called the stratum corneum.

Detailed explanation-3: -Keratinocytes. Keratinocytes are the most abundant type of skin cell found in the epidermis and account for around 90-95% of the epidermal cells. They produce and store a protein called keratin, a structural protein that makes skin, hair, and nails tough and waterproof.

Detailed explanation-4: -Answer and Explanation: The uppermost layer of the skin epidermis is the stratum corneum. This layer is composed of flat, and tightly packed dead cells called keratinocytes. The layer of keratinocytes forms a waterproof barrier that protects the underlying skin layers from the penetration of external water.

Detailed explanation-5: -The dermis is a fibrous structure composed of collagen, elastic tissue, and other extracellular components that includes vasculature, nerve endings, hair follicles, and glands. The role of the dermis is to support and protect the skin and deeper layers, assist in thermoregulation, and aid in sensation.