2 sentences for 心房 (xīn​fáng — atrium)

1. 心脏由心房和心室组成。

   xīn​zàng yóu xīn​fáng hé xīn​shì zǔ​chéng.

   The heart consists of atria and ventricles.

   Source: Dong Chinese Dictionary

2. 在心脏检查中，医生重点观察了患者左心房的血液流动。

   zài xīn​zàng jiǎn​chá zhōng, yī​shēng zhòng​diǎn guān​chá le huàn​zhě zuǒ xīn​fáng de xuè​yè liú​dòng.

   During the heart examination, the doctor focused on observing the blood flow in the patient's left atrium.

   Source: Dong Chinese Dictionary