WaterObjectivesSlide 3Functions of WaterSlide 5Slide 6Slide 7Slide 8Slide 9Body CompositionWater in the BodyWater in the BodyWater In The BodyBody FluidsSlide 15Water BalanceSlide 17Fluid:Nutrient ComparisonRecommended Water IntakeSlide 20Slide 21Fluid And Electrolyte ImbalanceCoffee vs. WaterSlide 24Slide 25Slide 26Slide 27Slide 28Water•Inorganic•Not energy-yielding•EssentialObjectives•After reading Chapter 7 and class discussion, you will be able to:–Define terms associated with water and body fluids –Describe the fluid composition of the body –Describe water balanceObjectives•Identify sources of water and % of water in selected foods•Discuss symptoms of dehydration•Apply oral rehydration therapy (ORT) •Describe functions of waterFunctions of Water•Transport •Solvent•Lubricant•Maintain blood volume•Body temperature regulation•Structural support for molecules•Participate in metabolic reactionsFunctions of Water•Transport –Carries nutrients to the cells and carries away waste materials to the kidneys and out of the body in urineFunctions of Water•Solvent –Keeps the following in solution so they can participate in metabolic activities:•Minerals •Vitamins•Glucose•Many other small molecules in the bodyFunctions of Water•Lubricant–Acts as a lubricant or cushion around joints; in the eye, the spinal cord–In pregnancy cushions the amniotic sac surrounding the fetusFunctions of Water•Maintains blood volume•Body temperature regulation–evaporation of sweat from the skim removes excess heat from the bodyFunctions of Water•Structural support–Maintains the structure of large molecules such as protein and glycogen •Metabolic reactions–Water participates in every step of the process of converting food to energy and tissueBody Composition60%Water in the Body •Nutrient composition of the body–Water = 60%–Fat = 13-31%•Male = 13 -21%•Female = 23 -31%–Carbohydrate, Protein, Vitamins, Minerals, Other = 9 – 27%Water in the Body•Example: 150# body –Water = 90#–Fat = 20 -45#–Carbohydrate, Protein, Major Minerals = 15 -40#–Vitamin, Minor Minerals = < 1#Water In The Body •Adult body composition is 60% water; higher in children•Water is ¾ of weight of lean tissue•Water is ¼ of weight of fat tissue•Proportion of water smaller in women, obese, and elderlyBody Fluids•Intracellular•Extracellular–Interstitial–IntravascularWater In = Water OutWater Balance•Water losses–Obligatory losses=500cc/day (2 c.)•Needed to dispose of body wastes–Insensible losses – lungs, skin•Water sources•Food sources (700-1000 cc) •Liquid sources–Water vs. LiquidsFluid:Nutrient ComparisonFluid Free Water (cc) Calories/ProteinWater 240 cc (100%) 0/0Juice (Apple) 210 cc (88%) 111/0Whole Milk 214 cc (89%) 150/8Instant Breakfast 217 cc (80%) 250/13Fruit Beverage Supplement191 cc (79%) 300/10Recommended Water Intake•1 cc/kcal (30-35 cc/kg)•6-10 cups per day •Adequate Intake (AI):•Men=3.7 L/day (about 14 c/day)•Women=2.7 L/day (about 10 c/day)Water Balance•Dehydration–See Signs of Dehydration –Treat with Oral Rehydration Therapy•Water Intoxication–Hyponatremia–Athletes –ElderlyFluid And Electrolyte Imbalance•Replacing lost fluids/electrolytes–Oral rehydration therapy (ORT)•½ L. boiling water•4 t. sugar•½ t. saltCoffee vs. Water•What about coffee/caffeine?•No significant difference in hydration •Caffeine naivetyJournal of American College of Nutrition 2000, 2003Objectives•After reading Chapter 7 and class discussion, you will be able to:–Define terms associated with water and body fluids –Describe the fluid composition of the body –Describe water balance–Identify sources of water and % of water in selected foodsObjectives•Discuss symptoms of dehydration•Apply oral rehydration therapy (ORT) •Describe functions of