Alexander Fleming and penicillin is used to help fight gram positive bacteria and other bacterial infections
It is two or more objects and different things that can be removed from each other.
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.