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Definition of «Ductus»

Ductus: A duct or walled passageway suitable for the conveyance of air or, more often in the body, liquids.

The term "ductus" also refers a key arterial shunt (ductus) in fetal life. Before birth, blood pumped from the heart through the pulmonary artery toward the lungs is shunted into the aorta. This arterial shunt, a short vessel, is the ductus arteriosus. When the shunt is open, it is said to be patent. The ductus arteriosus usually closes at or shortly after birth, permitting blood from that moment on to course from the heart directly to the lungs. However, if the ductus arteriosus remains open (patent), flow reverses and blood from the aorta is shunted into the pulmonary artery and recirculated through the lungs. A patent ductus may close later spontaneously (on its own) or need to be ligated (tied off) surgically.

Our word "duct" is a contraction of the Latin word "ductus" meaning "leading". The Romans, however, preferred the word "canalis" meaning "a pipe or gutter" for a conduit.

For More Information «Ductus»

  • ductus - definition of ductus in the Medical dictionary - by ...

    ductus /duc·tus/ (duk´tus) pl. duc´tus [L.] duct. ductus arterio´sus a fetal blood vessel that joins the descending aorta and left pulmonary artery.

  • ductus: Definition from Answers.com

    ductus n. , pl. ductus . Duct. ... IN BRIEF: Handwriting; Tube or vessel. LearnThatWord.com is a free vocabulary and spelling program where you only pay for results!

  • Ductus

    Ductus Development site. Ductus is a wiki system designed to handle arbitrarily-structured content and a variety of workflows. It is free software licensed under the GNU ...

  • What is patent ductus arteriosus (PDA)? - National Heart ...

    Patent ductus arteriosus (PDA) is a heart problem that occurs soon after birth in some babies. In PDA, abnormal blood flow occurs between two of the major arteries that ...

  • ductus - Wiktionary

    the number of strokes that make up a written letter, and the direction, sequence and speed in which they are written · a subtle reduction of weight ...

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