BIO1300 The Human Animal Stratum spinosum Topic 3: Skin anatomy Microfilaments Key Words Keratinization Desmosomes Tetrapod skin Cell adhesion Amphibia Stratum granulosum Dessication Keratin fibres Moist gametes Keratohyalin Moist skin Lamellar bodies Permeable skin Intercellular mortar Cutaneous respiration Lipids Reptile skin Proteins Impermeable scaly skin Hydrophobic barrier Keratin Lipophilic transmission Amniotic egg Dermal patches Internal fertilization Stratum lucidum Penis Cell death Cloaca Stopped metabolism Birds Final keratinization Scaly legs Dermis Keratinized beak Stratum papillare Keratinized claws Projections Feathers Epidermal grooves Mammals Fingerprints Hair Vascularization Whiskers Touch receptors Skin function Pain receptors Protection Reticulum layer Impermeability Collagen Thermoregulation Connective tissue Immune function Follicles Vitamin D Glands Sensory role Sebaceous glands Epidermis Sebum Dermis Lubrication Hypodermis Eccrine sweat Stratum corneum Apocrine sweat Wrinkly fingers Stress communication Dead cells Sexual communication Keratinized Mate choice Stratum basale Role of MHC Keratinocytes Major Histo-Compatability Complex Dividing cells Immune system Melanocytes Non-olfactory molecules Langerhaus cells Vomeronasal organ Merkel cells Jacobsen organ Health status Stem cells Inbreeding avoidance Hair replacement Complementary immune components Genetic control on growth length Genetic diversity of offspring Hair function Mammary glands Thermoregulation Nipples Insulating layer Milk production Constant body temperature Offspring feeding Activity in cold Specialized apocrine glands Protection Estrogen promotion Pheromones Testosterone inhibition Social communication Lactation Hair raising Egg incubation Finger and toe nails Infection inhibition Hardened keratin Monotreme Nail matrix Egg-laying mammals Cell generation Ventral mammary glands Cuticle barrier Skin colour Hyponychium Melanin Nail plate Eumelanin Nail bed Pheomelanin Lunula Carotene Wrinkles Anti-oxidant Fingerprints Health status Role of nerves Hemoglobin Water shedding Flushed skin Maintain grip Health status Adaptation to wetness Hair follicles Cuticle Cortex Medulla Shaft Root Bulb Matrix Hair papillae Generative cells Vascularization Melanocytes Follicle growth Anagen Growth phase Catagen Rest phase Telogen End phase