Circulatory system definition

The circulatory system definition is that it is a system which carries the oxygen to all part of the body.
Another definition is that it transports blood throughout the body due which oxygen, nutrients, electrolytes, and hormones reaches to their targeted areas 

This system includes 

The circulatory system transport blood to various organs in the human body via different methods. 

For example
The brain has a dual blood supply.
Lung receives blood through bronchial circulation.
The kidney receives blood through renal circulation.
Blood oxygenation occurs through the pulmonary circulation.
The heart receives blood through the coronary circulation.

Another definition is that it is a combination of systemic circulation and pulmonary circulation.

Systemic circulation is a type of circulation in which blood becomes oxygenated while in the systemic circulation the oxygenated blood is transported into the body.


The main function according to the circulatory system definition is that it transports oxygen, hormones, and nutrients to their target areas.

Cardiovascular diseases

According to the circulatory system definition, the disease which occurs in the heart, veins, and capillaries are known as cardiovascular diseases.

Some of them are
Heart attacks
Heart failure
Coronary artery disease
High blood pressure
Aortic aneurysm

Some of these diseases require an immediate response because they are life-threatening.

Circulatory system diagrams

Below are some of the diagrams of the circulatory system

circulatory system definition and diagrams
circulatory system definition and diagrams

In the above diagram, you will see the overview of the circulatory system that how the veins and arteries are present in the body and also you see the names of arteries and veins in this diagram. See the diagram carefully and you will understand easily what is a circulatory system.

this is a general diagram of the heart.

heart structure
heart structure