Skin and its derivatives and appendages form the integumentary system. In humans, skin derivatives include nails, hair, and several types of sweat and sebaceous glands. Skin, or integument, consists of two distinct regions, the superficial epidermis, and deep dermis. The superficial epidermis is nonvascular and lined by keratinized stratified squamous epithelium with distinct cell types and cell layers. Inferior to the epidermis is the vascular dermis, characterized by dense irregular connective tissue. Beneath the dermis is hypodermis or a subcutaneous layer of connective tissue and adipose tissue that forms the superficial fascia seen in gross anatomy
Skin and its derivatives and appendages form the integumentary system. In humans, skin derivatives include nails, hair, and several types of sweat and sebaceous glands. Skin, or integument, consists of two distinct regions, the superficial epidermis, and deep dermis. The superficial epidermis is nonvascular and lined by keratinized stratified squamous epithelium with distinct cell types and cell layers. Inferior to the epidermis is the vascular dermis, characterized by dense irregular connective tissue. Beneath the dermis is hypodermis or a subcutaneous layer of connective tissue and adipose tissue that forms the superficial fascia seen in gross anatomy