June 11, 2022

What is Cardiovascular System?

The cardiovascular system transport nutrition and blood in our body. It refers to the heart, vessels, and blood. Blood is a fluid that contains oxygen and nutrients are our body need for survival and activities. The body takes the essential nutrients and oxygen from the blood. Basically, the cardiovascular system is called a transport system in our body.

It conveys blood into the vessels, provides oxygen to tissues, and retreats carbon dioxide and other waste. The body dumps waste products by the blood, which needs to be removed like carbon dioxide. The main function of the cardiovascular system is to maintain blood flow throughout the body to survive, and veins deliver used blood from the body back to the heart.

Cardiovascular System Definition

Vertebrate and humans’ blood systems are circulated by a method which is called the cardiovascular system. The system is based on three important elements: blood, blood vessels, and the heart. The tissue gets vital nutrition and dumps waste like carbon dioxide and other toxic products by the cardiovascular system.

Parts Of Cardiovascular System

Various mechanisms and processes help to regulate and promote blood circulation. The most relevant parts of the system are given below:

Parts Of Cardiovascular System



Blood is a fluid that contains and carries oxygen and nutrients throughout the body, which are our body needs to survive and for vital functions. It also removes the wastes those are needed to be removed, like carbon dioxide. The human body cannot survive and function without blood.

Red blood cells providing oxygen rest of the body, and white blood cells fight against foreign invaders. The blood gets this oxygen from the lungs and delivers it to the whole body.

Blood Vessels

Blood vessels are another essential part of the cardiovascular system. Blood vessels are tubes that transport blood to the rest of the body. Blood vessels are classified into arteries, veins, and capillaries, depending on their function.

Arteries carry oxygenated blood from the heart, and veins carry carbon dioxide-filled blood from the body. Capillaries are very narrow and microscopic blood vessels that connect arteries and veins. There are about 1,00,000 miles long of blood vessels in an adult body.


The heart makes blood circulation by acting as a pump, and the blood carries oxygen and nutrients to all tissues of the rest of the body. If the heart stops working for a few minutes, the blood will not be circulated throughout the body, and the whole body will stop working, and the whole life will fall in danger. The heart has two sides, as left and right sides, and four chambers.

Left atrium, right atrium, left ventricle, and right ventricle. Atria are thin-walled and receive blood from the veins. On the other hand, thick-walled ventricles pump blood out of the heart. The left and right sides of the heart simultaneously promote flood flow And pump blood throughout the body.

On the left side, the blood flows from the lungs to the atrium and then the ventricle, which pumps throughout the body. On the right side, the blood flows from the rest of the body into the lungs.

Functions of Cardiovascular System

The cardiovascular system is the body’s transport system and responsible for the circulation of oxygen and transport of nutrients throughout the body. On the other hand, blood also cleans the body by collecting waste products like carbon dioxide. The body can perform its normal function by providing oxygen and removing waste products by blood are the main function of the cardiovascular system.

Some functions of the cardiovascular system are given below:

  • Provides oxygen and removes carbon dioxide.
  • Provides nutrients need for cells.
  • Protects the body from disease and infection.
  • Stops bleeding after injury by clotting blood.
  • Removes waste products of metabolism to the excretory organs to dispose of.
  • Maintain homeostasis of the body.

Due to submit animal existence cardiovascular system is essential. Tissues activities are based on oxygen and other nutrients and essential to dump waste. Hormone others gland pervade by the system. The cardiovascular system plays an important role and preserve animal existence.

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