Endocrine system is formed by ductless glands. Characteristics of Hormones are minute, chemical messengers, act on target organs. Endocrine glands release hormones directly into the blood. Pituitary gland is the master gland and secrets many hormones. Hypothalamus is a neuro – endocrine part. Thyroid gland is the largest endocrine gland.Thyroxine is the hormone of thyroid gland.Cretinism is a disease in children. Myxoedema is due to hypothyroidism.Exopthlamic goitre is due to hyperthyroidism.Goitre is due to deficiency of iodine in food.Parathyroid is located on thyroid.Parathormone is secreted by parathyroid.Tetany is sustained contraction of muscle.
Osteoporosis is a bone related complication.Supra renal glands are located on kidneys.Adrenalin secreted by adrenal glands.Insulin secreted by pancreas.Glucagon, Somatostatin, Pancreatic Polypeptide are also secreted by pancreas.Diabetes mellitus is a disease due to deficiency of insulin.Oestrogen is a female hormone secreted by ovary.Progesterone maintains uterus during pregnancy.Testosterone is a male hormone for secondary sexual characters.Pineal gland is located at dorsal to diencephalon.Melatonin is a hormone secreted by pineal gland.