What are proteins?

What are fats?

What is the role of water in nutrition?

What is the introduction to digestion?

What are digestibility concepts?

Hannah is studying the efficiency of different energy sources for her science project. She wonders, what are energy losses and metabolizability?

Mia is studying animal nutrition and comes across the terms total digestible nutrients (TDN) and energy terms. She wonders what these terms mean and how they apply to the diets of livestock.