What does diverticula look like?

Diverticula. Like a sac or outpouching, just like that that can occur in a water hose. From the inside it looks like a hole.
Diverticula. For a helpful illustration see: https://www.mayoclinic.org/diseases-conditions/diverticulitis/multimedia/diverticulosis-and-diverticulitis/img-20006098.