Transportation in human beings happens through hemoglobin or blood.

The alveoli of the lungs act as the crucial medium in the entire process of receiving oxygen and releasing CO2. 

So What is Alveoli?

An Alveoli is The Tiny Air Sacs in Your Lungs. 

To understand better, 

Imagine your lungs as a pair of soft, spongy balloons inside your chest, helping you breathe. 

Now, picture these balloons having little pockets or bubbles on their surface – these tiny pockets are called alveoli.

They’re the crucial part where the exchange of oxygen and carbon dioxide happens.

The process of Oxygen and Carbon Dioxide Transportation: – 

  1. When you breathe in, oxygen rushes into your lungs.
  2. This oxygen travels through the air pipes and reaches the alveoli.
  3. In the alveoli, oxygen goes into your blood, and carbon dioxide comes out.

Oxygen Transportation

Oxygen in alveoli moves to the thin wall-like vessels. 

These vessels are called capillaries. 

Here, capillaries transfer oxygen to every blood cell of the body. 

Carbon-dioxide Transportation

At the same time, carbon dioxide from your blood travels back into the alveoli.

When you breathe out, you release CO2 into the atmosphere. 

This is how oxygen and carbon dioxide are transported in human beings.

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