What is the histology of pituitary gland?
The pituitary gland or hypophysis is derived from two embryologically-distinct tissues. As such, it is composed of both neural and glandular tissue. It composed of bundles of axons from hypothalamic neurosecretory neurons intermixed with glial cells.
What cells is pituitary gland made of?
The pituitary is divided into three sections-the anterior lobe which constitute the majority of the pituitary mass and is composed primarily of five hormone-producing cell types (thyrotropes, lactotropes, corticotropes, somatotropes and gonadotropes) each secreting thyrotropin, prolactin, ACTH, growth hormone and …
What type of tissue makes up the posterior pituitary gland?
The posterior pituitary is neural tissue and consists only of the distal axons of the hypothalamic magnocellular neurons that make up the neurohypophysis. The perikarya (cell bodies) of these axons are located in paired paraventricular and supraoptic nuclei of the hypothalamus.
What is the histology of endocrine?
Histology of The Endocrine Glands. Endocrine tissue is made up of cells that produce secretions which are poured directly into blood. Endocrine cells lie in close apposition to blood capillaries or sinusoids. Secretions of endocrine cells are called hormones.
What is the structure of pituitary gland?
Structure. The pituitary gland, in humans, is a pea-sized gland that sits in a protective bony enclosure called the sella turcica. It is composed of two lobes: anterior and posterior, with the intermediate lobe that joins the two regions. In many animals, these three lobes are distinct.
What is the histology of thyroid gland?
Histologically, the thyroid gland is organized as epithelial cells surrounding colloid-containing pools, called follicles. The colloid is rich in thyroglobulin, a protein possessing many tyrosine residues to which iodine molecules attach to form the thyroid hormones.
Why pituitary gland is called hypophysis?
pituitary gland, also called hypophysis, ductless gland of the endocrine system that secretes hormones directly into the bloodstream. The term hypophysis (from the Greek for “lying under”)—another name for the pituitary—refers to the gland’s position on the underside of the brain.
What does pituitary gland control?
Your pituitary gland is an important pea-sized organ. If your pituitary gland doesn’t function properly, it affects vital parts like your brain, skin, energy, mood, reproductive organs, vision, growth and more. It’s the “master” gland because it tells other glands to release hormones.
Which hormone is secreted by posterior pituitary?
The posterior lobe produces two hormones, vasopressin and oxytocin. These hormones are released when the hypothalamus sends messages to the pituitary gland through nerve cells. Vasopressin is also known as antidiuretic hormone (ADH).