Understanding the basic concepts of our body’s mechanism is always crucial. Moreover, it is vital information that helps you understand the terms that a doctor uses when explaining complicated matters to you. So, let’s begin.

Internal and external respiration are two different concepts although the basic concept is the same. External respiration is he name that is given to breathing. It is the exchange of oxygen and carbon dioxide involving the lungs.

On the other hand, internal respiration involves the exchange of gases between the blood and the cells. Before proceeding further, it is critical to comprehend that:

  • Oxygen is the chief gas that is needed by us and our cells to function. Therefore, during both internal and external respiration oxygen travels in
  • Carbon dioxide is poisonous by nature so it needs to eliminated from the body’s internal environment. Thus, this gas travels out in both the types of respiration

What is external respiration?

External respiration is the exchange of gases, mainly, carbon dioxide and oxygen, to and from the lungs. Carbon dioxide is taken out, whereas, oxygen is breathed out. If we dig deeper, we’ll see that the air is exchanged by means of the gaseous exchange via the blood.

In that, oxygen travels from the lungs via the lung alveoli to the blood capillaries. Simultaneously, carbon dioxide is released. External respiration is also known as breathing.

What is internal respiration?

Internal respiration is the exchange of gases between the cells and the blood. All the cells in the body require oxygen to function. On the other hand, they need to excrete carbon dioxide. This occurs via the process of internal respiration.

During the process, carbon dioxide moves from the cells to the blood to be eliminated. On the flip side, oxygen travels from the blood to the cells to be used for its activities. This process is also referred to as cellular or tissue respiration.