When you chew your food to break down the larger pieces into smaller particles, how are you to increase the rate of the chemical reactions in your body that breaks down your food?

The digestive system is the process of breaking down the food brought into the body through four steps: ingestion, digestion, absorption, elimination. All of these steps happen throughout the tissues and organs of the digestive system. Your digestive system has two parts, the digestive track and the additional organs that help out breaking down absorb the food. The organs included in this are the tongue, salivary glands, liver, gallbladder, and pancreas. The digestive track extends from the mouth to the anus. It is made of different organs connected by a formation similar to a tube. Each of these organs is particular for a certain function

Brownies are good but they're messier than cookies. sugar cookies are also fun and more versatile to decorate. especially cut out cookies.

Ican only answer your first question, a machine is like a human body because it's a little similar. they both almost work like the same.