sentence: Some burrows are simple tubes a few centimeters long.
sentences_before: Burrows can be made in different materials. Kangaroo mice make burrows in sand. Termites make burrows in wood. Some sea urchins and clams make burrows in rock. Burrows can also be make in different shapes and sizes.
sentences_after: Others are many tunnels and rooms that connect to each other.
concept_name: burrow
headings: Burrow
categories: Animals