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.
Most ESL and EFL learners know that the verb's number in a sentence must match the subject's number. That is, if the subject is singular, the verb must be singular, and if the subject is plural, the verb must be plural: SINGULAR SUBJECT: The dog barks every morning. PLURAL SUBJECT: The dogs bark every morning.