Anterior and posterior
Anatomical reference terms may be confusing because they are different for pigs that walk on four legs vs. upright, bipedal humans.
Toward the head: for the pig, anterior is used; for humans, superior is used. In either case, rostral may be used to mean toward the nose.
Toward the tail: for the pig, posterior is used; for humans, inferior is used (toward the feet). In either case, caudal may be used to mean toward the "tail end" of the animal.