When referring to the lumen of the stomach is that just the opening. As in where are the HCl is and where your food enters? I googled the definition of lumen and it says inside space. I'm just not too clear on what it really means. Thanks.
Biology - The Stomach - PsyDAG, Monday, March 28, 2011 at 11:30am
Try more specific key words, like "lumen of the stomach."