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
Hereditary fructose interolance is a rare recessive disorder that is caused by a mutation in the aldolase B gene. As a result of this disorder individuals may have all of the follo

B l u e t on g u e Bluetongue (BT) is a non-contagious and arboviral disease of both domestic and wild ruminants. The disease is enzootic in areas where reservoirs (cat

What is the function of the umbilical cord? The umbilical cord haves blood vessels which convey blood among the fetus and the placenta.

Soaking Soaking is an another inexpensive processing method, which does not require much technical know how, is commonly practiced for improving the palatability of chaffed cro

Q. Explain Injection Rate and Volume? This is best achieved by injecting directly into the ventricular chamber. Midcavitary position of the catheter ensures that there is no ve

Explain the Anaesthesia and Analgesia Most implant surgery can be carried out under local anaesthesia, although some patients will require sedation or general anaesthesia. The

Q. Since among the 64 codons of mRNA 61 codify amino acids that form polypeptide chains what are the functions of the three remaining codons? Since there are 20 amino acids and

There are two main sources of pollution: (1). Natural Sources:             (a) Volcanic ash             (b) Marsh gas (CH4) released from decay of organic matter.

What is the aim of specialised assessment The aim of specialised assessment is often to identify a syndrome and specify its probable basis in abnormal brain function. The basi

The A and B antigens in humans may be found in water-soluble form in secretions, including saliva, of some individuals (Se/Se and Se/se) but not in others (se/se). The population t