Obtaining Energy and Removing Waste

What is the unit used to measure the amount of energy in food?

• Calories

• Kilograms

• Degrees

• Liters

What are nutrients?

• Parts of food used by the body to grow and survive

• Units of energy in food

• Chemicals that help break down food

• Waste products of digestion

Which nutrient helps to build muscles?

• Proteins

• Calcium

• Carbohydrates

• Vitamins

What is digestion?

• The breakdown of food into small particles and molecules

• The absorption of nutrients into the bloodstream

• The elimination of waste from the body

• The storage of food in the stomach

Where does mechanical digestion begin?

• Mouth

• Esophagus

• Stomach

• Small intestine

What is the function of the esophagus?

• To connect the mouth to the stomach

• To store food temporarily

• To absorb nutrients

• To eliminate waste

What is the stomach's role in digestion?

• To store food and aid in chemical digestion

• To absorb nutrients

• To eliminate waste

• To filter and remove wastes from blood

Where does most chemical digestion occur?

• Small intestine

• Large intestine

• Mouth

• Esophagus

What happens in the large intestine?

• Remaining water is absorbed and waste products become more solid

• Chemical digestion occurs

• Nutrients are absorbed into the bloodstream

• Food is temporarily stored

Which body system collects and eliminates waste from the body?

• Excretory system

• Respiratory system

• Digestive system

• Circulatory system