What is Single Circulation?

Single circulation is characterized by the fact that blood passes through the heart only once each cardiac cycle. Single circulation is found in fishes where the blood is pumped by the heart to the gills for oxygenation, after that it flows to the rest of the body and back to the heart.

Furthermore, their hearts are two-chambered, with only one atrium and one ventricle. As a result, single circulation has a significant disadvantage: the oxygen delivery rate is slower, and the rate of metabolism is reduced as a result. Humans have a double circulatory system, where blood travels in two separate circuits.

What is Single Circulation?

Single circulation is a circulatory system in which blood passes through the heart only once in the entire cycle. Single circulation is exhibited by fish where the heart pumps deoxygenated blood to the gills for oxygenation. The oxygenated blood then flows to the rest of the body and back to the heart.

Single circulation and double circulation differences lie in the number of times blood passes through the heart in each cycle. In this article, we will cover single circulation examples, diagrams and its features.

Table of Content

  • What is Single Circulation?
  • Single Circulation Examples
  • What are the Main Features of Single Circulation?
  • What are the Differences Between Single Circulation and Double Circulation?
  • Single Circulation Diagram
  • Single Circulation in Fish

Similar Reads

What is Single Circulation?

Single circulation is characterized by the fact that blood passes through the heart only once each cardiac cycle. Single circulation is found in fishes where the blood is pumped by the heart to the gills for oxygenation, after that it flows to the rest of the body and back to the heart....

Single Circulation Examples

The following are some of the examples of single circulation:...

What are the Main Features of Single Circulation?

The following are the main features of single circulation:...

What are the Differences Between Single Circulation and Double Circulation?

The following table lists the differences between single circulation and double circulation:...

Single Circulation Diagram

The diagram given below shows the single circulation:...

Single Circulation in Fish

Similar to the circulatory system of the human body, a single system is responsible for nourishing and transporting oxygen to all fish. Only blood reaches the heart in a whole cycle of one circulatory system, except just after going through the body of this fish. The process of gases exchange happens in the gills, thus through them the blood from the heart is delivered (carbon dioxide is released and oxygen is absorbed)....

Conclusion – Single Circulation

In conclusion, the single circulation flowing blood contains one circuit via which the heart and the body complete the process within a single pass. This single circulation is seen in the fish as their hearts comprise only two chambers—the atrium and ventricle. Although this system is not very efficient with oxygen regulation, it works with a simple exchange mechanism and process. However, it does have a problem or a drawback of oxygen getting delivered at a lower rate, which in turn affects metabolic efficiency....

FAQs on Single Circulation

How does Single Circulation Differ from Double Circulation?...