2.3 energy and waste Flashcards
The amount of energy in food is measured in calories.
Calorie.
Releases the energy from the processed food.
Your digestive system.
The parts of food used by the body to grow and survive.
Nutrients.
5 examples of nutrients.
Proteins, fats, carbohydrates, vitamins, and minerals.
The mechanical and chemical breakdown of food into small particles and molecules that our body can absorb and use.
digestion.
The 4 steps of digestion.
Ingestion,digestion, absorption, and elimination.
When you chew, mash, and grind food with your teeth and tongue.
Mechanical digestion.
Break down pieces of food into small molecules.
Chemical digestion.
When you put food, such as bread, into your mouth.
Ingestion.
An enzyme, in your mouth, that helps break down carbohydrates.
Saliva.
A muscular tube that connects the mouth to the stomach.
Esophagus.
Food moves through the esophagus and the rest of the digestive tract by the waves of muscles contractions.
Peristalsis.
A large, hollow organ that stores food.
Stomach.
An adult stomach can hold about ___________of food and liquid.
2 liters.
Enable the stomach to expand and hold large amounts of food.
The folds on the inner walls.
