Answer:
C. come from other cells.
Explanation:
Answer:
The digestive system helps break down complex meals into the constituent parts the body can use: carbohydrates, proteins, fats, vitamins and minerals.
Digestion is important for breaking down food into nutrients, which the body uses for energy, growth, and cell repair. Food and drink must be changed into smaller molecules of nutrients before the blood absorbs them and carries them to cells throughout the body.
Explanation:
Answer:B
Explanation:bc all of the other ones was equal together and the concentration gradient could not spread them
