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 noun SUBJECT has 8 senses: 1. the subject matter of a conversation or discussion. 2. some situation or event that is thought about. 3. a branch of knowledge. 4. something (a person or object or scene) selected by an artist or photographer for graphic representation.ypernyms (subject is a kind of...): knowledge base; knowledge domain (the content of a particular domain or field of knowledge). Hyponyms (each of the following is a kind of subject): futuristics; futurology (the study or prediction of future developments on the basis of existing conditions).