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 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.
How do you differentiate anterior and posterior pituitary microscopically?
The posterior part of the pituitary has its embryological origins in nervous tissue. It is formed from a downgrowth of the diencephalon that forms the floor of the third ventricle. The anterior part is derived from an upgrowth from the oral ectoderm of the primitive oral cavity called Rathke’s pouch.
Who coined the term histology?
Karl Meyer
The French anatomist Xavier Bichat introduced the concept of tissue in anatomy in 1801, and the term “histology” (German: Histologie), coined to denote the “study of tissues”, first appeared in a book by Karl Meyer in 1819.
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.
What is the Colour of pituitary gland?
Glands with light-brown color and which exhibit spongy property are selected for extract preparation. The active principle of pituitary gland is GTH, which is glycoprotein in nature and extremely sensitive to temperature denaturation.
Which is largest part of pituitary gland?
The anterior pituitary is by far the largest part of the gland and is responsible for synthesis and release of most pituitary hormones (with the exception of oxytocin and antidiuretic hormone (ADH) which are released by the posterior pituitary).
What is pars pituitary gland?
Pars intermedia is the boundary between the anterior and posterior lobes of the pituitary. It contains colloid-filled cysts and two types of cells – basophils and chromophobes. The cysts are the remainder of Rathke’s pouch. However, the pars intermedia is normally either very small or entirely absent in adulthood.
What gland contains the anterior pituitary?
A major organ of the endocrine system, the anterior pituitary (also called the adenohypophysis or pars anterior), is the glandular, anterior lobe that together with the posterior lobe (posterior pituitary, or the neurohypophysis) makes up the pituitary gland (hypophysis).
Is pituitary gland part of the brain?
The pituitary is a pea-sized gland that sits at the base of the brain. The pituitary, a pea-sized gland, is part of the endocrine system. The pituitary gland is a small, oval gland (about the size of a pea) that’s located at the base of your skull.
What is the anatomy of the pituitary gland?
In vertebrate anatomy, the pituitary gland, or hypophysis , is an endocrine gland about the size of a pea and weighing 0.5 grams (0.018 oz) in humans. It is a protrusion off the bottom of the hypothalamus at the base of the brain. The hypophysis rests upon the hypophysial fossa of the sphenoid bone in the center…
Where is pituitary located?
The pituitary gland is located in the brain, between the hypothalamus and the pineal gland, just behind the bridge of the nose. It is about the size of a pea and is attached to the brain by a thin stem of blood vessels and nerve cell projections. The frontal lobe is the biggest part of the pituitary.