Thyroxine is the main hormone secreted into the bloodstream by the thyroid gland. It plays vital roles in digestion, heart and muscle function, brain development and maintenance of bones.
A singular subject is a noun or a pronoun for just one person, place, or thing. A plural subject is a noun or a pronoun that is two or more persons, places, or things. Exampl â¦ es: Singular subject: The boy came for lunch. He was hungry. Plural subject: The boys came for lunch.
1 (a.) That of which anything is affirmed or predicated; the theme of a proposition or discourse; that which is spoken of; as, the nominative case is the subject of the verb. ( 2 a.) Hence, that substance or being which is conscious of its own operations; the mind; the thinking agent or principal; the ego. 3  Cf. 4  Object, n., 2.