Question

The process of breakdown of complex food substances into simpler forms is carried out by the:

• A. Excretory system
• B. Digestive system
• C. Circulatory system
• D. Respiratory system

Answer 1

The correct option is B Digestive system

The complex components of food cannot be utilized by the body directly. So they are broken down into simpler substances in the presence of specific enzymes. The process of breakdown of complex food substances into simpler forms is called digestion and it occurs in the digestive system where the enzymes are secreted.

These nutrients are broken down so that it can be absorbed and further converted to energy. All of this occurs with the help of the digestive system.