Definition

Relating to the sinoatrial node, which is a group of cells in the heart that helps control the heartbeat.

Example

The doctor explained that a sinoatrial block can affect the heart's rhythm.

Conversation

Did you know that the heart has a sinoatrial node that helps regulate its rhythm?

Really? I had no idea that it played such an important role.

Yeah, it's fascinating how the sinoatrial node acts as the heart's natural pacemaker.

That makes sense! The body has so many amazing systems working together.

Synonyms & Antonyms

Root Explanation

Sinoatrial → It is formed from "sino-" (from Latin "sinus", meaning bay or fold) and "atrial" (from Latin "atrium", meaning entrance or main room). The term refers to the area of the heart where the sinus node is located, which is the main pacemaker of the heart, thus combining the meanings of a bay-like structure (sino-) and the entrance chamber (atrial).

Memory Tip

Think of the 'bay' ('sino-') where the heart's main 'entrance' ('atrial') is located, helping you remember that 'sinoatrial' relates to the heart's pacemaker.

Visually Confused Words