Arthur's Free Respiratory System Clipart

Free respiratory system clipart, respiratory images, respiratory drawings, respiratory nomenclature, is of large format and is suitable for presentations, school projects etc. This clip art is useful for students and teachers of biology and zoology. The images are too large for use on web pages. unless you use the thumbnail pictures. Selections of both colour and black and white clip art are available. Please feel free to use them anyway you wish for non commercial purposes only Please do not include these in any other collections of clip art.

To download a thumbnail left click on the picture and then "Save As" to a directopry of your choice.To download the full size image, first right click on the thumbnail and then left click on the full size image and "Save As" to a directory of your choice.

A respiratory systemīs function is to allow gas exchange. The space between the alveoli and the capillaries, the anatomy or structure of the exchange system, and the precise physiological uses of the exchanged gases vary depending on the organism. In humans and other mammals, for example, the anatomical features of the respiratory system include airways, lungs, and the respiratory muscles. Molecules of oxygen and carbon dioxide are passively exchanged, by diffusion, between the gaseous external environment and the blood. This exchange process occurs in the alveolar region of the lungs.

The respiratory system can be subdivided into an upper respiratory tract and a lower respiratory tract based on anatomical features. The upper respiratory tract includes the nasal passages, pharynx and the larynx, while the lower respiratory tract is comprised of the trachea, the primary bronchi and lungs. The respiratory system can also be divided into physiological, or functional, zones. These include the conducting zone (the region for gas transport from the outside atmosphere to just above the alveoli), the transitional zone, and the respiratory zone (the alveolar region where gas exchange occurs).

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Last updated June 2014