student with book thyroid mascot cartoon style

anatomical anatomy arytenoid biology book cartilage cartoon character clever cricoarytenoid cricothyroid cute diagnose education emoticon emotion endocrine expression funny geek happy healthcare healthy hormone human hyperthyroidism hypothyroidism illustration inflamed inflammation internal larynx learner mascot medical medicine organ parathyroid pharynx school science skill smart smile student study system thyreoidea thyroid trachea