BIO 121 Study Guide - Midterm Guide: Stratum Corneum, Stratum Basale, Loose Connective Tissue
Document Summary
Chapter 4-integument: list 6 general structures that compose the integumentary system. 4. 2 skin, hair, nails, sweat and oil glands, mammary glands: list 6 functions of the integument. Epidermis and dermis: define thick versus thin skin. Thick skin contains 5 layers in the epidermis, the fifth and distinctive later is the stratum lucidum, thick skin can be found on palms of hands and soles of feet. Thin skin contains 4 layers of epidermis not including stratum lucidum; this is found everywhere else on the body: list and briefly describe four cell types found in the epidermis. Keratinocytes- tough protein keratin, melanocytes- produce pigment located deep in epidermis, markel- sensation, langerhans- immune response: list and briefly describe the 5 layers of the epidermis. Stratum basale (stratum germinativum) deepest layer, thin contains keratinocytes and melanocytes, continuously producing more cells. Stratum ganulosum last layer containing nucleus bound organelles, waterproof coat. Stratum lucidium- no organelles or nucleus, compact dead cells.
