Air must pass from the back to the front of the pharynx to enter the trachea and food must pass from the front to the back of the esophagus
Acetylcholine..
hope it helps
Organ is an organism that is a collection of tissues and it perform a specific functions.It is found in the higher biological systems like plants, animals, and human beings. While the organelle is a part of a cell that specialized units and capable of performing a specific function for the cell. It is a very small subunits inside a cell.
I think the answer will be C (Uterus).
