Question

multiple - choice question
the human ______ system is dependent upon the use of enzymes.
skeletal
digestive
excretory
respiratory

Explanation:

Enzymes play a crucial role in breaking down food in the digestive system. For example, amylase helps break down carbohydrates. The skeletal system is mainly about support and movement, the excretory system is for waste - removal, and the respiratory system is for gas - exchange, none of which rely on enzymes in the same fundamental way as digestion.

Answer:

B. digestive