2 examples of ring-like in sentences

The ring-like muscles of the pylorus relax at intervals to allow the muscles of the stomach to force the partly digested mass into the small intestines.

Then I asked the man to look at my throat, so that he might give me some idea of what manner of place the swelling seemed, and he, lighting a piece of the dry seaweed to act as a torch, made examination of my neck; but could see little, save a number of small ring-like marks, red inwardly, and white at the edges, and one of them was bleeding slightly.

2 examples of  ring-like  in sentences