# Your Heart in a Glass (DD-315)

> Cardiomyocytes are the muscle cells of the heart. They can generate and conduct electrical impulses, and their myofibrils of actin and myosin let them contract. Neighboring cells are joined by intercalated discs, which pass electrical signals quickly so the heart contracts together. Lab-grown cardiomyocytes can beat by themselves in a dish. The footage shows beating heart cells under a microscope.

- Department: Science (also People)
- First published: 2024-09-01
- Last updated: 2024-09-01
- Permalink: https://detailenjoyer.com/case/your-heart-in-a-glass/
- Original Reel title: Your Heart In A Glass ❤️
- Author: Marcus Easterling (DetailEnjoyer), The Detail Department

## Quick facts

- **DD-315-F01**: Heart muscle cells are cardiomyocytes. _(Write-up · Exhibit A (Cardiomyocytes))_
- **DD-315-F02**: They conduct electrical impulses. _(Write-up · Exhibit B (Impulses))_

## Write-up

Heart muscle cells can beat on their own in a dish. Intercalated discs let them contract in sync.

1. **Cardiomyocytes**: Heart muscle cells are cardiomyocytes.
2. **Impulses**: They conduct electrical impulses.
3. **Myofibrils**: Actin and myosin let them contract.
4. **Discs**: Intercalated discs link them.
5. **In a dish**: They can beat in a dish.

## Related case files

- [I Wanted You to Know... (DD-265)](https://detailenjoyer.com/case/i-wanted-you-to-know/): I linked more on the heart

## Reel vs. record

- **Note**: None needed.

## Video: Your Heart in a Glass: Heart Muscle Cells Can Beat on Their Own in a Dish

- Duration: 29.7 s · Published: 2024-09-01
- File: https://detailenjoyer.com/assets/videos/C_ZFfHoJi2e.mp4

### Transcript

Did you know, cardiac cells, also known as cardiomyocytes, are the specialized muscle cells that make up the heart's tissue and are responsible for its contraction and rhythmic beating? These cells are unique in their structure and function, as they are capable of generating and conducting electrical impulses that coordinate heartbeats. Cardiac cells contain myofibrils, which are composed of actin and myosin filaments, enabling them to contract and pump blood efficiently. They are interconnected by structures called intercalated discs, which facilitate the rapid transmission of electrical signals and synchronize heart contractions. NOW YOU KNOW!

## Questions & answers

**Q: What are heart muscle cells called?**  
A: Cardiac cells. _(Source: Write-up · Exhibit A (Cardiomyocytes) · Wikipedia: Cardiac muscle cell)_

**Q: Which proteins contract?**  
A: In myofibrils. _(Source: Write-up · Exhibit B (Impulses) · Wikipedia: Cardiac muscle cell)_

**Q: What links them?**  
A: For fast signals. _(Source: Write-up · Exhibit C (Myofibrils) · Wikipedia: Cardiac muscle cell)_

**Q: Can they beat in a dish?**  
A: Lab-grown. _(Source: Write-up · Exhibit D (Discs) · Wikipedia: Intercalated disc)_

**Q: What do they conduct?**  
A: To coordinate beats. _(Source: Write-up · Exhibit E (In a dish) · Wikipedia: Cardiac muscle cell)_

## Sources

- [Wikipedia: Cardiac muscle cell](https://en.wikipedia.org/wiki/Cardiac_muscle_cell)
- [Wikipedia: Intercalated disc](https://en.wikipedia.org/wiki/Intercalated_disc)

## Cite this case file

Easterling, Marcus. "Your Heart in a Glass." The Detail Department (DetailEnjoyer), case file DD-315, last updated Sep 1, 2024. https://detailenjoyer.com/case/your-heart-in-a-glass/