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. the state, fact, or quality of being singular. 2. a singular, unusual, or unique quality or thing; peculiarity. 3. a point at which a mathematical function of real or complex variables is not differentiable or analytic. 4. a region of infinite density, as in a black hole.