respiratory system

noun

, Anatomy.

the system by which oxygen is taken into the body and an exchange of oxygen and carbon dioxide takes place; in mammals the system includes the nasal passages, pharynx, trachea, bronchi, and lungs.

respiratory system

the specialized organs, collectively, concerned with external respiration: in humans and other mammals it includes the trachea, bronchi, bronchioles, lungs, and diaphragm

respiratory system

The system of organs and structures in which gas exchange takes place, consisting of the lungs and airways in air-breathing vertebrates, gills in fish and many invertebrates, the outer covering of the body in worms, and specialized air ducts in insects.

respiratory system

The organs in the body involved in respiration . Air enters the body through the nose and mouth and travels down the trachea , through the bronchial tubes , and finally into the lungs . Once in the lungs, the air is drawn into an enormous number of thin-walled sacs richly supplied with capillaries . The exchange of oxygen and carbon dioxide in the blood takes place in these tiny sacs.

First recorded in 1935–40

Changing environment induced changes in the respiratory system and far-reaching consequences followed.

Closely bound up with the respiratory system is the nature of the circulation of blood through the gills.

The respiratory system is formed of two series of appendages, as found beneath the thorax.

This has been called a branchial arm, not that it carried a branchia, but on account of its relation to the respiratory system.

The respiratory system is represented by the anlage of the lungs, a longitudinal protrusion of the ventral wall of the esophagus.

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