(a) Hypothalamus
Hormones secreted by the hypothalamus include Releasing Hormones. These hormones stimulate the secretions of the pituitary hormone. Examples of these hormones are :
Gondotrophin-releasing hormone
Thyrotrophin-releasing hormone
Somatotropin-releasing hormone
Adrenocorticotrophin-releasing hormone
Inhibiting Hormones inhibits the secretions of the pituitary hormone. Examples of these hormones are :
(b) Pituitary : The pituitary gland ha two component i.e., adenophypophysis and neurohypophysis. Hormones secreated by the adenohypophysis are :
Growth hormone (GH)
Prolactin
Thyroid-stimulating hormone (TSH )
Adrenocorticotrophic hormone (ACTH)
Luteinzing hormone (LH)
Follicle-stimulating hormone (FSH)
Melanocyte-stimulating hormone (MSH) Hormones secreted by the neurohypophysis are :
Oxytocin
Vasopressin
(c) Thyroid : The thyroid glands secretes 3 hormones namely, thyroxin, triiodothyronin and calcitonin (t3 t4)
(d) Parathyroid : Secretes a hormone known as parathyroid hormone.
(e ) Adrenal: The adrenal gland is divided into 2 parts, the outer adrenal cortex and the linner adenal medulla.
Hormones of adrenal cortex include the following :
Mineralocorticoids: Secreted is known as aldosterone.
Glucocorticoids: secretes is cortisol.
Hormones of adrenal medullla are adrenaline and nor-adrenalin.
(f) Pancreas insulin and glucagan .
(g) Testis: tetosterone,
(h) Ovary: estrogen and progresterone.
(i) Thymus: Hormones secreated by the thymus and thymosins,
(j) Atrium: The walls of the atrium secrete atrial natriuretic factor.
(k) Kidney: erythropoietin.
(I) G-I tract: Gartrin, secretion, chlecystokinin (CCK), and gastruc ihibitoary peptide (GIP).
