In ill or injured persons, the natural airway formed by the trachea may be damaged or closed off. Intubation is the medical procedure of inserting an artificial tube into the trachea to permit breathing. See also choking.
In insects, each segment of the body has a pair of spiracles, each of which has a trachea behind it. Air moves into these small tubes through the spiracles. These tracheae branch and supply air to the tissues, where oxygen is absorbed into the body. Insects do not carry oxygen in their blood, as do vertebrates; this limits their size.
Share your thoughts, questions and commentary here
Want to know more? Search encyclopedia, statistics and forums:
Press Releases |
The Wikipedia article included on this page is licensed under the
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms, 1022, m