atrium sinistrum

8.6

The left upper chamber of the heart that receives oxygen rich blood from the lungs

noun
/ˈeɪ.tri.əm sɪˈnɪs.trəm/

Specialized

: aurícula izquierda

Oxygenated blood enters the atrium sinistrum via the pulmonary veins.

Examples

Blood flows from the lungs into the atrium sinistrum.
The surgeon inspected the atrium sinistrum for signs of abnormal tissue.
A defect in the atrium sinistrum can lead to inefficient blood circulation.
The atrium sinistrum plays a crucial role in heart function.
Oxygenated blood enters the atrium sinistrum via the pulmonary veins.
A defect in the atrium sinistrum can lead to inefficient blood circulation.
Blood flows from the lungs into the atrium sinistrum.

Synonyms

left atrium

vsatrium sinistrum

Specialized

1 4.5

Upper left part of the heart that gets oxygen-rich blood from the lungs and sends it to the left ventricle

emphasizes receiving from pulmonary veins rather than pumping onward

Surface Forms

atrium sinistrum singular

atria sinistra plural

Morphology

atrium + sinistrum

This is a literal compositional medical term: 'atrium' (upper heart chamber) combined with 'sinistrum' (Latin for 'left'), so the meaning 'left atrium' follows directly from the constituents. Although 'sinistrum' is not glossed in the provided data, the relation is transparent and cross‑linguistically parallel, so a learner who knows both parts would understand the MWE.

Etymology

Atrium sinistrum comes from Latin words atrium meaning 'entrance hall' and sinistrum meaning 'left'. So the name gives a simple image: the heart's left 'entrance hall', the upper left chamber that gets oxygen-rich blood from the lungs.