Take a closer look at an earthworm, and you will notice that its body is constructed of ringed segments that look like a row of miniature doughnuts bunched tightly together.
Ja rūpīgi apskata slieku, var pamanīt, ka tā sastāv no gredzenveida posmiem, kas to padara līdzīgu cieši kopā saspiestu baranku virtenei.