Integumentary System
Immune System. System of chemicals, white blood cells, and tissues that protect the body against pathogens (disease causing microorganisms) Immune system.
THE IMMUNE SYSTEM. The Immune System 1st Line of Defense: Surface Barriers §The Skin: heavily keratinized epithelial membrane presents a physical barrier.
Carbohydrates Proteins Fats Minerals Vitamins Water Fibre (Roughage)