The endocrine system consists of several glands, all in different parts of the body, that secrete hormones directly into the blood rather than into a duct system. Therefore, endocrine glands are regarded as ductless glands. Hormones have many different functions and modes of action; one hormone may have several effects on different target organs, and, conversely, one target organ may be affected by more than one hormone.
Endocrinology is a branch of biology and medicine that deals with the endocrine system, its unique links known as diseases, and hormones. It is also associated with the combination, multiplication, enlargement and differentiation of developmental phenomena, psychological or behavioral activities of metabolism, growth and development, tissue processing, sleep, digestion, respiration, excretion, mood, stress, lactation, movement, reproduction. . and a feeling of arousal caused by hormones. Deuteronomy includes endocrinology and comparative endocrinology.
The endocrine system consists of several glands that secrete hormones directly into the bloodstream, not into the canal system. The endocrine glands are therefore considered to be non-dairy glands. Hormones have different functions and actions; Hormones can have different effects on different organs, on the contrary, more than one hormone can affect the target organ..
Endocrinology is the study of the endocrine system in the human body. This is a system of glands that secrete hormones. Hormones are chemicals that affect the action of various organ systems in the body. For example, it contains thyroid hormone, growth hormone, and insulin. The endocrine system includes several response mechanisms, so it will often monitor the movement or release of another hormone (like thyroid-stimulating hormone) and another second hormone (like thyroid hormone). If the secondary hormone is too high, it can retain homeostasis and respond negatively to the main hormone
Hormones
Griffin and Ojeda identify three different classes of hormones depending on their chemical composition

Amines
Amines such as norepinephrine, epinephrine, and dopamine (catecholamines) are formed from single amino acids, in this case, tyrosine. Thyroid hormones such as triiodothyronine and tetraiodothyronine form part of this class because they are formed by the combination of two iodized tyrosine amines. acid residues.
Peptide and protein
Peptide hormones and protein hormones consist of three (in the case of thyrotropin-releasing hormone) to more than 200 (in the case of follicle-stimulating hormone) amino acid residues and can have a molecular mass as large as 31,000 grams per mole. All hormones secreted by the pituitary gland are peptide hormones, as are leptin from adipocytes, ghrelin from the stomach, and insulin from the pancreas.

Author's Bio: 

Dr. Deepthi Kondagari has done her MBBS from Osmania Medical College, MD in Internal Medicine from Kakatiya Medical College and attained her DNB in Endocrinology from Yashoda hospital, Secundrabad a 1200 bedded tertiary care hospital.