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.
A subject pronoun is a pronoun that is used only as the subject of a sentence or a clause. The subject personal pronouns are: I, we, he, she, they. An object pronoun is a pr â¦ onoun that is used only as the object of a verb or a preposition. The object personal pronouns are: me, us, him, her, them.