Medical Root
atri/o
atri/o means atrium (upper heart chamber) (from the Latin atrium, meaning entrance hall).
What does atri/o mean?
The root atri/o means an atrium, one of the two upper chambers of the heart that receive blood returning to the heart. It comes from the Latin word atrium, meaning entrance hall. It appears in words about these chambers and their conditions. For example, atrial relates to the atrium, and an atriotomy is a surgical incision into an atrium. It often appears alongside ventricul/o, which means the lower chambers.
Example words using atri/o
Related word parts
cardio · ventriculo · itis
Frequently asked questions
What does atri/o mean?
The root atri/o means an atrium, one of the two upper chambers of the heart, and comes from Latin.
What does atrioventricular mean?
It relates to both the atria and the ventricles, combining atri/o and ventricul/o.
How many atria does the heart have?
Two, a right atrium and a left atrium, which receive blood returning to the heart.
Study reference only — not medical advice. Always consult qualified sources for clinical decisions.