The hagfish is an animal that has 1 true heart.
According to the provided reference, the hagfish, often called the slime eel, possesses one true heart along with three accessory pumps that aid in circulating its blood. This is noteworthy as some other creatures, such as jellyfish, starfish, and corals, do not have hearts at all.
Animals with One Heart:
- Hagfish: The hagfish has a single primary heart, which is different from some animals that have multiple hearts or none. Its circulatory system is unique, using additional pumps to support blood movement.
It is important to differentiate that while some animals, such as hagfish, have a single heart, others may have multiple or no hearts at all. Each animal's cardiovascular system is adapted to its environment and needs.
Here is a summary of the differences:
| Animal | Number of Hearts |
|---|---|
| Hagfish | 1 (plus three accessory pumps) |
| Jellyfish | 0 |
| Starfish | 0 |
| Corals | 0 |
