Solved cryptogram
Heart muscle sets its own rhythm. A heart removed from the body will go on beating by itself.
Biology Facts, sourced to NHLBI.
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What it means
A patch of specialized tissue called the sinoatrial node fires spontaneously and paces the rest of the muscle, so the signal originates in the heart rather than arriving from the brain. Nerves adjust the rate up or down to suit the situation, but they do not start it. This is why a donor heart begins beating again once it is warmed and supplied with blood.
The claim comes from NHLBI.
- SourceNHLBI
- CollectionBiology Facts
- Difficultymedium
- Length74 letters, 20 unique
Nearby in the collection
The facts either side of this one.
- NIDCDeasy, 74 letters
- NIDDKhard, 74 letters
- NHLBIhard, 75 letters
- MedlinePluseasy, 72 letters
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