WAEC Biology 2014 Theory — Question 7

Model answer

The diagram should show, fully labelled: the columnar epithelium (outer covering), a central lacteal (lymph vessel), a network of blood capillaries, goblet cells (mucus-secreting), and the muscle layer at the base of the villus. (A hand-drawn diagram is required in the exam; the labelled parts listed above are the key features to include.)