HLTH 354 Lecture Notes - Lecture 1: Mohs Surgery, Rosacea, Foodborne Illness
Document Summary
Medical specialty that studies a&p of integumentary system and uses diagnostic tests, med. and surgical procedures, and drugs to treat integumentary diseases. Anatomy: integumentary system: skin (epidermis and dermis), sebaceous and sweat glands, hair and nails. Ous-pertaining to cutane/o- skin: protects body and is 1st line of defense against invading microorganisms, includes sense of touch, skin. O2 from blood vessels in dermis: contains melanocytes=pigment cells produce melanin=dark brown/black pigment absorbs uv light from sun to protect dna in skin cells from undergoing genetic mutations. Nails: cover and protect distal ends of fingers and toes, each consists of nail plate, nail bed, cuticle, lunula, and nail root. Physiology of allergic rxn: allergy/allergic rxn=hypersensitivity response to certain types of antigens=allergens. Histamine inflammation, redness (erythema), swelling (edema), irritation, and itching (pruritus: systemic rxn occurs when allergens inhaled/ingested by, or injected into, a hypersensitive person causing symptoms in several body systems. Histamine constricts bronchioles, dilates blood vessels throughout body, and causes hives on skin.
