OSTIUM ARTERIOSUM Meaning and
Definition
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Ostium arteriosum, also known as the arterial ostium, refers to the opening or entrance of an artery. It is a term commonly used in the context of cardiac anatomy and physiology.
In the human body, the ostium arteriosum specifically refers to the opening between the right ventricle and the pulmonary artery. This opening allows for the flow of deoxygenated blood from the right ventricle to be ejected into the pulmonary circulation, where it will be subsequently oxygenated.
An important feature of the ostium arteriosum is that it is guarded by the pulmonary valve, which ensures that blood flows in one direction, preventing any backflow into the heart. The pulmonary valve consists of three cusps or leaflets, creating a triangular shape that covers the ostium arteriosum.
The ostium arteriosum is a critical component of the human circulatory system, as it provides the pathway for blood to be transported from the heart to the lungs. Its proper functioning is vital for the effective oxygenation of blood and the overall functioning of the cardiovascular system.
Overall, the ostium arteriosum serves as the entrance through which the right ventricle pumps blood into the pulmonary artery. Its presence and functionality are essential for the circulation of deoxygenated blood to undergo oxygenation in the lungs.
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Arterial orifice, the opening from the ventricle of the heart into the aorta or the pulmonary artery.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for OSTIUM ARTERIOSUM
Etymology of OSTIUM ARTERIOSUM
The word "ostium arteriosum" is a Latin term that can be broken down into two parts: "ostium" and "arteriosum".
1. Ostium: The word "ostium" comes from the Latin word "ōstium", which means "door" or "opening". It is derived from the Latin verb "os", meaning "mouth". In medical terminology, "ostium" refers to an opening or entrance.
2. Arteriosum: The word "arteriosum" is derived from the Latin word "arteria", which means "artery". The suffix "-osus" in "arteriosum" denotes "full of" or "having the characteristics of". Hence, "arteriosum" can be understood as "artery-like" or "pertaining to the artery".
