What is digestion?
Digestion is the break down of food after it has been eaten.   It converts large food molecules into water soluble molecules.  These smaller water soluble molecules can then be absorbed by blood plasma and used as energy within the human body's cells.  The nutrients are also used for growth and tissue repair.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What is digestion?
### Input: 
### Response: Digestion is the break down of food after it has been eaten.   It converts large food molecules into water soluble molecules.  These smaller water soluble molecules can then be absorbed by blood plasma and used as energy within the human body's cells.  The nutrients are also used for growth and tissue repair.