Fact 1: The digestive system breaks food into nutrients for the body.

Fact 2: Raw proteins provide nutrients for regeneration of cells, promoting healing, youth and longevity.

Given the two facts above, answer the question "What provides the regeneration of cells for the body?" with the following options: 
- Thyroid-stimulating hormone
 - the kiln
 - Earthworms
 - the kitchen
 - the digestive system
 - prolactin release
 - Pituitary gland
 - the corona


 

     the digestive system    