Question

why are the hormones released directly into the blood stream?plz answer fast plz..........

Answer 1

All ductless glands such as eg pineal , pituitary, thalamus, thyroid , parathyroid , thymus , adrenals and pancreas ,endocrine glands release hormones directly into the blood stream.These glands have no ducts to release hormones produced by them. Hence they release the hormones directly into blood stream. They let out the produced hormones by way of the blood vessels supplying the glands.