Classification of endocrine structures

• Central endocrine organs:

• The Hypothalamus

• The Pituitary gland (the Hypophysis)

• The Pineal gland (the Epiphysis)

II. Peripheral endocrine glands:

• The Thyroid gland

• The Parathyroid glands

• The Adrenals

III. Organs combining endocrine and non-endocrine functions:

• The Pancreas

• The Kidneys

• The Gonads

• The Placenta

IV. Single hormone-producing cells - diffuse endocrine system

Endocrine cells in different parts of the nervous, gastro-intestinal and respiratory systems