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.
The singular form of a word is the form which applies only to one object, place, concept, animal, or person. For nouns, the singular form is usually the form which does not en â¦ d in S. On verbs, the singular form usually ends in an S. Of course, for many words, another word is used instead, like using they as the plural form of he or she.