A bunch of free and printable pig diagrams are available to assist you in your biology class! Pigs, usually the fetal ones, are among the most common animals used in classroom dissection. Pigs share same traits with human, which make it the reason why they are one common animal for dissection. Shared traits include common hair, mammary glands, live birth, similar organ systems, metabolic levels, and basic body form. Use the following anatomy diagram resources to review the anatomy of the pig. The cut/dissection guide is posted right below.