Lymphatic drainage of tongue:
Tip of tongue- submental lymph node
Marginal part of anterior 2/3rd of the tongue- U/L submandibular nodes
Central part of anterior 2/3rd of the tongue - B/L jugulo diagastric and jugulo omohyoid lymph nodes
Posterior 1/3rd of the tongue- B/L jugulo diagastric and jugulo omohyoid lymph nodes
Root of tongue - b/l upper deep cervical lymph nodes