Zona medullovasculosa is a term that refers to an area in the adrenal gland responsible for the production of aldosterone. The spelling of this term can be broken down using IPA phonetic transcription as /ˈzoʊnə mɪˌdʌloʊvæˈskjuːləsə/. The "o" in "zona" and "medullo" is pronounced like the "o" in "zone" or "low". The "u" sound in "vasculosa" is pronounced like the "u" in "cup" or "up". The stress is on the syllables "dul" and "vas".
The term "zona medullovasculosa" refers to a specialized area within the medulla oblongata, which is a part of the brainstem. It is located on the ventral surface of the medulla near the pyramids, which are prominent ridges formed by descending motor fibers. The zona medullovasculosa is also known as the "vascular area of the medulla."
The primary characteristic of the zona medullovasculosa is its role in regulating blood pressure and maintaining homeostasis. It consists of a dense network of blood vessels, including capillaries, arterioles, and venules. These blood vessels are responsible for supplying and draining blood to and from the medulla oblongata.
The zona medullovasculosa is an important component of the baroreceptor reflex, which helps control blood pressure. Baroreceptors are specialized nerve endings located in the walls of blood vessels that detect changes in blood pressure. When blood pressure increases, baroreceptors in the zona medullovasculosa transmit signals to the brainstem, leading to a decrease in sympathetic nerve activity and a subsequent reduction in blood pressure. Conversely, when blood pressure decreases, baroreceptors send signals that increase sympathetic nerve activity to raise blood pressure.
In summary, the zona medullovasculosa is a specific region in the medulla oblongata that plays a critical role in regulating blood pressure. Through its dense network of blood vessels, it helps maintain homeostasis by responding to changes in blood pressure and modulating sympathetic nerve activity.
The fissured segment of the spinal cord which closes dorsally the sac in myelomeningocele.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "zona medullovasculosa" is derived from Latin and Greek roots.
1. "Zona" comes from the Latin word "zōna", meaning "belt" or "zone".
2. "Medullo" originates from the Latin word "medulla", which translates to "marrow" or "core".
3. "Vasculosa" is derived from the Latin word "vasculum", meaning "small vessel" or "tube".
Hence, "zona medullovasculosa" can be translated as "belt of medullary vessels". This term is often used in biology and anatomy to describe a region of the adrenal gland where blood vessels and cells producing hormones are concentrated.