ANP 1106 Lecture 2: ANP1106Lecture2Summary

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1106
• Professor: Jacqueline Carnegie

Document Summary

The skin and its derivatives (sweat, hair oil, nails) make up the integumentary system. The epidermis: epithelial cells (thick keratinized stratified squamous epithelium), is the outermost protective shield. The dermis: underlying, mainly composed of dense connective tissue. Hypodermis: subcutaneous tissues just deep to the skin -- also called superficial fascia. Anchors skin to underlying structures, still loose enough for the skin to slide over structures. Ingest foreign substances and activate the immune system: tactile (merkel) cell, epidermal junction, act as a sensory receptor for touch. Several cell layer thick weblike system of filaments that attach to cytosol. Cell types: fibroblasts, macrophages, some mast cells, white blood cells. Semi-fluid matrix with collagen, elastin and reticular fibres. Richly supplied with nerve fibres, blood, lymphatic vessels, hair follicles, and oil and sweat glands. Areolar ct with interlacing collagen and elastic fibres. Dermal papillae: peg-like projections indent overlying epidermis. High friction areas: dermal papillae overlie dermal ridges to give.