【Skill 1】Learn 生殖腺 (gonads) and 脳下垂体 (pituitary gland)
Learn the following expressions to understand the explanations about the maintenance of the internal environment of the body:
■ 生殖腺 (gonads)
■ 遺伝子 (gene)
■ 脳下垂体 (pituitary gland)
■ 視床下部 (hypothalamus)