Similarly, gonadotropin-releasing hormone (GnRH) controls the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH). Surgeons operating on the pituitary gland must have an intimate knowledge of the portal system to avoid damaging these critical vessels during transsphenoidal procedures.
Hypothalamic Pituitary Axis Portal Vein Signaling and Hormonal Regulation
Primary Capillary Plexus: Fenestrated capillaries with high permeability, allowing hormones to enter the portal circulation efficiently. This ensures a high concentration of regulatory hormones at the target cells.
Anatomy and Structure of the Hypophyseal Portal System The system is anatomically divided into two capillary beds connected in series by hypophyseal portal veins. Physiological Function and Hormonal Regulation The primary function of the hypophyseal portal veins is to convey hypothalamic tropic hormones to the anterior pituitary without significant dilution in the systemic circulation.
Hypothalamic Pituitary Axis Portal Vein Signaling in Hormonal Regulation
These veins then terminate in the second capillary network, the secondary or anterior pituitary plexus, which surrounds the pars tuberalis and invades the anterior lobe of the gland. Secondary Capillary Plexus: The site where target cells of the anterior pituitary encounter the hypothalamic regulators.
More About Hypophyseal portal veins
Looking at Hypophyseal portal veins from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on Hypophyseal portal veins can make the topic easier to follow by connecting earlier points with a few simple takeaways.
