Describe and explain the structures and functions of the layers of the skin What is the function of the integumentary system? Identify the specific layers (stratum . .) of the epidermis and their order from superficial to deep? What is the difference between thick and thin skin? Which is found on the top of your head? What is the papillary and reticular dermis and what is their relative positioning between each other? What are dermal papillae? Why is increasing surface area useful? What are tension (cleavage) lines? Compare and contrast the epidermis, dermis, and hypodermis_ What is the order of layers of the integument from superficial to deep? Which types of epithelial and connective tissuels) make(s) up the epidermis, dermis, and hypodermis? What are the types of cells you can find in the epidermis, dermis, and hypodermis? What are melanocytes and what do they produce? How does melanin and melanocyte concentration vary with varying skin tones? What layer of the epidermis can you find melanocytes? Describe the function of the epidermis and dermis_ Is the hypodermis technically considered part of the integumentary system? Describe the structures and explain the functions of the appendages of the skin Describe the anatomy of a hair follicle? What layer of the skin can you technically find hair follicles in (this one is tricky)? What are the substructures of the hair follicle? Within the hair follicle where does growth of the hair pilus occur? What is the difference between vellus and terminal hair? What is the function of arrector pili muscles? Where can they be found? Are they useful in humans? Be able to Identify the structures of a nail (Eponychium; Hyponychium; Lunula, Nail body, Nail root; Nail folds). Which part of the integument creates the nail? What are sebaceous and sweat glands? What do they produce? What is the function of each secretion? What's the difference between eccrine and apocrine sweat glands? Where can you typically find each on the body?