Chemical Coordination and Integration – Notes
Human Endocrine System
Endocrinology is a branch of medicine dealing with the study of the endocrine glands and the actions of their hormones.
The hypothalamus, pituitary, pineal, thyroid, parathyroid, thymus, pancreas, adrenal and gonads are the endocrine glands in our body.
Endocrine glands are also called ductless glands due to the absence of ducts.
Hormones are non-nutrient chemical messengers secreted in trace amounts by glands or neurons.
Exocrine glands release their secretions through ducts and are called duct glands.
Glands in the human body that have both exocrine and endocrine properties are known as heterocrine glands.
Hypothalamus, Pituitary Gland and Pineal Glands
The hypothalamus is a part of the fore brain and appears as the floor of the diencephalon.
Neurohormones are of two types- releasing hormones and inhibiting hormones.
The pituitary is the smallest endocrine gland but it produces hormones which control the thyroid gland, adrenal cortex and gonads.
The pituitary gland is divided anatomically into the sdenohypophysis and the neurohypophysis.