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Windpipe

Windpipe

(Science: anatomy) The passage for the breath from the larynx to the lungs; the trachea; the weasand.

The gas exchange system in humans and other mammals consisits of two major parts, a conduction system, for the conduction of inspired and expired gases, and an interface for the exchange of gases between air and blood. The conducting system begins with the nasal passages and continues as the trachea. The trachea divides to form the left and right bronchi which supply the lungs. The bronchi divide into numerous smaller bronchioles which eventually lead into the alveoli, where gas exchange occurs.

The inside of the thoracic cavity is lined with a pleural membrane. Each lung is also surrounded by a separate pleural membrane. The space between the two pleural membranes is fillied with a thin film of fluid(known as pleural fluid), which prvents friction between them during breathing.


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Theories - Origin of Life

... to protect the lungs. You rightly refer to choking that occurs when the epiglottis fails to cover the trachea, and food becomes lodged in our windpipe. The closing of the larynx during swallowing indicates anticipation does it not? I would argue that this is not a matter of faulty design but ...

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by scottie
Thu Apr 14, 2011 4:56 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 560
Views: 907170

Theories - Origin of Life

... and the food/water pathway don't cross each other. Avian respiratory anatomy and physiology is kind of complicated but I'll give it a shot. The windpipe opens at the base of the tongue where debris isn't trapped easily like the back of our pharynx. A system of air sacs then direct air through ...

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by BDDVM
Wed Apr 13, 2011 12:30 am
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 560
Views: 907170


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