Study the diagram below and answer the questions that follow.
![digestive system diagram](https://www.easyelimu.com/images/form_3_past_papers/Term_1_2021/digestive_system_diagram.PNG)
- Identify the above digestive system.
- name the parts labelled A, B, C and D.
- State one function of the part labelled D mentioned in (ii) above.
- What makes the part labelled c be more effective in its functions?