Question

Mechanical (physical) vs. chemical digestion?
What are the similarity and differences?

Answer 1

Food being broken down by mechanical movement such as chewing, Chemical digestion e.g enzymes or HCL.

Answer 2

Could you explain enzymes and HCL?

Answer 3

Allright forget the HCL think simpler, Gastric acid breaks down food.
And certain enzymes breaks down proteins into aminoacids where they diffuse through the wall of the intestine for instance.

Answer 4

http://www.nutritionreview.org/library/gastric.acid.php