Tracheoles - respiration, Biology

Tracheoles - Respiration

The tracheal system consists of an air filled system of tubes - the tracheal tubes that branch repeatedly until they become fine as capillaries, and are called tracheoles. The tracheolar endings arc in close proximity to the cells of the body and sometimes they indent into the plasma membrane giving the impression that they actually enter the cells. Trachea varies in diameter from 1-2 mm and the diameter of tracheoles is between 0.6-0.8 mm. In the larger tracheae, thickenings known as taenidia in the cuticular lining prevent the tubes from collapsing. The walls of the tracheae become progressively thinner as they branch so that the tracheolar endings are only 5, μn in diameter. Figure shows the arrangement of tracheal system in some insects.

1926_Tracheoles.png

Figure: Some modifications of the tracheal system in insects. (a) The basic pattern, (b) mechanically ventilated air sacs, (c) terminal spiracles in aquatic insects.

Posted Date: 1/15/2013 7:31:46 AM | Location : United States







Related Discussions:- Tracheoles - respiration, Assignment Help, Ask Question on Tracheoles - respiration, Get Answer, Expert's Help, Tracheoles - respiration Discussions

Write discussion on Tracheoles - respiration
Your posts are moderated
Related Questions
a) What is biological magnification? b) Describe how DDT as a water pollutant undergoes biological magnification?

Give one example in each case of the usefulness of bacteria in (a) a natural environment, (b) an industrial process.   (a) In a natural environment bacteria brin

Complications : IABP can compromise blood flow to the leg at the time of insertion, pumping or after removal of balloon. It may also cause perforation, bleeding, thrombosis, embol

Name the corrosion resistant metals Most of the corrosion resistant metals or alloys used for implants have a layer of oxides on their surface. The thin (approximately 5 nm) la

Vitamins Micronutrients are as important as major nutrients for the animal body. Vitamins are organic compounds required in minute amounts to assist metabolic processes and for

what is Cytokinesis in cell reproduction? Cytokinesis: Mitosis is usually followed by cytokinesis, the division of the cytoplasm and cell membrane. Cellular organelles are no

Determine Vitamin A requirements of school children and adolescents? The vitamin A requirement of children and adolescents has been computed from growth curve interpolation dat

Assessment of new born The main purposes are: i) To identify normal characteristics in the neonate ii) To identify existing abnormalities, ii any iii) To carry

Answer the following eight questions (a through h) based upon a tripeptide sequence of the following amino acids (one-letter codes are given): S (serine) P (proline) K (lysine)

In the human body, the potassium ion can pass easily through cell membranes, yet the potassium ion concentration is higher inside many cells than it is outside these cells. Could t