How Do You Spell PARS MEMBRANACEA SEPTI ATRIORUM?

1. The term "pars membranacea septi atriorum" is a phrase used in medical terminology and refers to the membranous part of the septum that separates the left and right atria of the heart. Here is a 200-word dictionary definition of this term:

   Pars membranacea septi atriorum, anatomically known as the membranous portion of the atrial septum, is a thin, flexible membrane that forms part of the partition dividing the two upper chambers of the heart, namely the left and right atria. Situated in the middle of the atrial septum, the pars membranacea septi atriorum is composed of a delicate and translucent connective tissue.

   Its primary function is to provide structural support and maintain the physical separation between the left and right atria, ensuring the unidirectional flow of blood through the heart. This partition plays a vital role in preventing the mixing of oxygenated and deoxygenated blood, allowing for efficient circulation. Moreover, the pars membranacea septi atriorum also acts as a barrier, preventing the spread of electrical signals between the atria, which helps in maintaining the heart's rhythmic contractions.

   Pathological conditions that affect the pars membranacea septi atriorum can result in abnormalities such as atrial septal defects, characterized by an abnormal opening in the atrial septum. In such cases, blood can shunt from one atrium to the other, leading to potential complications. These conditions may require surgical intervention to repair or close the defect, restoring the integrity of the pars membranacea septi atriorum and optimizing heart function.

2. A triangular space at the base of the interauricular septum of the heart where the muscular tissue is very thin or absent.

   A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.

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