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How the Circulatory System Works

Reviewed by
Date published
13/12/2021
Date last updated
30/11/2021
Length of read
3 Minutes

The circulatory system, sometimes known as the cardiovascular system, is a single loop that starts and ends with your heart. It allows for blood to pump through your body without exiting it. This is important as your blood is incredibly important for your overall well being. Let's delve deeper into the circulatory system and all that it does.

What Does The Heart Do?

The heart is a pump that typically beats 60 to 100 times per minute. The heart sends blood throughout our bodies with each beat, delivering oxygen to every cell. The blood is then sent to the lungs via veins. When we exhale, air enters the lungs and sends oxygen to the bloodstream. The heart then pumps blood to the lungs in order to obtain more oxygen. This process repeats over and over again.

What Does The Circulatory System Do?

Blood vessels in the circulatory system transport blood away from and towards the heart. Arteries transport blood away from the heart, while veins transport it back to the heart.

The circulatory system transports oxygen, nutrients, and hormones to cells, as well as waste materials such as carbon dioxide. Only one direction is possible with these roads since they are designed to keep things moving in the proper direction.

What Are The Parts Of The Circulatory System?

The heart provides two pathways:

  • The pulmonary circulation is a loop that starts at the heart and ends with the lungs, then repeats.
  • The systemic circulation transports blood throughout the entire body and back again, ensuring that all of the body's tissues have sufficient amounts of oxygen.

Pulmonary circulation

The pulmonary artery is a major vessel that originates from the heart. It divides into two main branches, bringing blood from the heart to the lungs. The blood picks up oxygen and releases carbon dioxide at the lungs before returning to the heart through the pulmonary veins.

Systemic circulation

Because the heart receives most of its oxygen from the lungs, blood that has returned there has picked up a significant amount of oxygen. As a result, it is now able to go to the entire body.

The aorta is a large vessel that carries oxygenated blood from the heart. The branches of the aorta distribute blood to the heart's muscles and all other areas of the body. As they get further away from the root, the branches grow smaller and smaller.

At each body part, a network of little blood vessels known as capillaries connects the tiny artery branches to the small veins. The walls of the capillaries are extremely thin, and nutrients and oxygen are passed through them.

Small veins branch off of capillaries, which eventually merge with them. As the blood approaches the heart, it narrows into larger and larger vessels. Valves in veins prevent blood from flowing in the wrong direction. The superior vena cava and inferior vena cava are two large veins that enter the heart.

To drop off CO2 and pick up more oxygen, the blood must re-enter the pulmonary circulation and return to the lungs after it has been restored in the heart.

How To Keep Your Circulatory System Healthy

  • Exercise frequently.
  • Eat nutritious foods
  • Maintain a healthy weight.
  • Quit smoking.

Tell your doctor if you have any chest discomfort, difficulty breathing, or dizziness or fainting episodes; or if you feel like your heart beats rapidly or skips a beat from time to time.