Digestive Quiz 1. The finger-like projections of the small intestine that give the mucosa a velvety appearance and greatly increase the surface area are called a. circular folds b. cilia c. haustra . Dec 5,  · Download a comprehensive PDF containing multiple-choice questions (MCQs) on Digestive System Anatomy with detailed answers. Ideal for medical students, competitive . Digestive System. Quiz. Instructions: Answer each question. Your digestive system works on the foods you eat for about: a. 5