ADVERTISEMENT
Shrimp
Shrimps have the distinction of having a particularly unusual heart. This small, segmented invertebrate has what’s known as a single, open circulatory system. Which means its heart pumps oxygen-rich blood in and out of the body without the benefit of any veins or arteries. The blood circulates through its body, and then returns to the heart to be pumped out again. This allows the shrimp to get oxygen to different parts of its body faster than other animals. In addition, the shrimp’s heart is located in its head and is covered by a membrane to protect it from the elements.
