Final answer:
The buccal, sublingual, and intradermal routes are unrelated to parenteral administration of medications, as they do not involve injections or infusions that bypass the digestive system.
Step-by-step explanation:
The routes that are unrelated to the parenteral administration of medications are buccal, sublingual, and intradermal. Parenteral routes involve administrating medication by bypassing the digestive system, which usually means injections or infusions. Therefore, the buccal route (placing it between the gum and cheek), sublingual route (placing it under the tongue), and intradermal route (injection just under the skin) do not fall under parenteral administration. In contrast, the Z-track and intravenous routes are parenteral methods.