Question

When half of the class got sick, Jaden stayed healthy. What part of the endocrine system MOST likely played a role in helping Jaden fend off the class's sickness?

Answer 1

The thymus gland — it secretes thymosin, which stimulates maturation of T lymphocytes (T cells). That endocrine action helps produce an effective immune response, letting Jaden resist the classmates' infection.