Answer:
It's the oesophagus.
Explanation:
The worm digestive system consists of the pharynx, the esophagus, the crop, the intestine and the gizzard. The oesophagus is not mentioned. Thus, it's not part of the worm digestive system.
<em>ANSWER 10 MOLES OF CARBON DIOXIDE</em>
2C0 + O2 → 2CO2
2 moles of carbon monoxide forming 2 moles of carbon dioxide
10 moles of carbon monoxide will form 10 moles of carbon dioxide