Chemical coordination is handled by the Endocrine System.
It is made up of glands that secrete hormones.
Ductless glands are endocrine glands.
Hormones are the secretions of the endocrine glands.
The endocrine glands in human bodies are the pituitary, pineal, thyroid, adrenal, pancreas, parathyroid, thymus, and gonads (testis in males and ovary in females).