20 Examples of Direct and Indirect Breathing

The breathing is the process by which living beings exchange oxygen and carbon dioxide with the environment around them: the process occurs because Organisms take up oxygen from the environment and at the same time release the dioxide produced in the cells.

In the case of the most evolved living beings, this exchange it is produced before the environment by means of certain specialized organs in that function. A classification is usually made of the different ways in which this exchange occurs:

Direct breathing

The direct breathing is the one that occurs when there is an exchange of gases between the environment and the cells of the organism, without the intervention of a respiratory organ. The gas enters by simple passive diffusion, the irreversible physical process from which Particles are introduced into a medium in which they were previously absent from passage through a membrane.

The fundamental cause of this step is that the oxygen concentration is higher in the external environment than in the internal environment. It is also called

skin respiration, and is produced from the epidermis as long as the outer cuticle is moist.

Examples of direct breathing

Indirect breathing

The indirect breathing It is the process of incorporation of cells that are not in contact with the environment, so a set of specialized organs must mediate for gas exchange.

In cases where indirect respiration occurs with the gas diffusion in the blood by means of a specialized respiratory organ they are called external respiration, while the exchanges between blood and cells are called internal respiration.

This type of breathing is usually divided into three groups:

Indirect breathing examples

Lung breathing

The lung respiration It is the one that is carried out through the structures of the respiratory system that limit the mediastinum on two sides. In these organs the blood receives oxygen from the air, and at the same time gives off carbon dioxide that is released. Here are some species that perform this type of respiration:

Branchial breathing

The gill breathing is what they do aquatic animals They capture the dissolved oxygen in the water, which is transported to the tissues. The gills differ strongly from the lungs because they are outside the body of the fish in the head section, because they need to be in direct contact with the water.

There are animals with gills that live in salt water and gilled animals that live in fresh water. These are some animals of this type:

Tracheal breathing

The breath of the insects and of the invertebrates is of type tracheal, from the tubes that open on the outside of your body (tracheae), through which oxygen passes until it reaches the cells. These tracheae divide to form tracheae, which open to the environment through tiny seals. Here are some of these animals:

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