Why is respiration in insect called direct respiration

An respiratory system is the system with which it introduces respiratory Air enters the respiratory systems of insects through a series of external openings called It is responsible for delivering sufficient 2) to all cells of the body and for removing 2) that is produced as a waste product of Structure of the spiracle [ ] The spiracles are located laterally along the thorax and abdomen of most insects—usually one pair of spiracles per body segment. Air flow is regulated by small muscles that operate one or two flap-like valves within each spiracle—contracting to close the spiracle, or relaxing to open it. Structure of the tracheae [ ] After passing through a spiracle, air enters a longitudinal tracheal trunk, eventually diffusing throughout a complex, branching network of tracheal tubes that subdivides into smaller and smaller diameters and reaches every part of the body. At the end of each tracheal branch, a special cell provides a thin, moist interface for the exchange of gases between atmospheric air and a living cell. Oxygen in the tracheal tube first dissolves in the liquid of the Each tracheal tube develops as an The absence of taenidia in certain parts of the tracheal system allows the formation of collapsible air sacs, balloon-like structures that may store a reserve of air. In dry terrestrial environments, this temporary air supply allows an insect to conserve water by closing its spiracles during periods of high evaporative stress. Aquatic insects consume the st...

Insects, like people, require oxygen to live and produce carbon dioxide as a waste product. That, however, is where the similarity between the insect and human respiratory systems essentially ends. Insects do not have lungs, nor do they transport oxygen through a circulatory system in the manner that humans do. Instead, the Insect Respiratory System For insects, air enters the respiratory systems through a series of external openings called spiracles. These spiracles, which act as muscular valves in some insects, lead to the internal respiratory system which is comprised of a densely networked array of tubes called tracheae. How Do Insects Control Respiration? Insects can control respiration to some degree. They are able to open and close their spiracles via muscle contractions. For example, an insect living in a desert environment can keep its spiracle valves closed to prevent moisture loss. This is accomplished by contracting muscles surrounding the spiracle. In order to open the spiracle, the muscles relax. Insects can also pump muscles to force air down the tracheal tubes, thus speeding up the delivery of oxygen. In cases of heat or stress, insects can even vent air by alternately opening different spiracles and using muscles to expand or contract their bodies. However, the rate of gas diffusion—or flooding the inner cavity with air—cannot be controlled. Due to this limitation, as long as insects continue to breathe using a spiracle and tracheal system, in terms of evo...

Respiratory System All insects are aerobic organisms — they must obtain oxygen (O 2) from their environment in order to survive. They use the same metabolic reactions as other animals (glycolysis, Kreb’s cycle, and the electron transport system) to convert nutrients (e.g. sugars) into the chemical bond energy of ATP. During the final step of this process, oxygen atoms react with hydrogen ions to produce water, releasing energy that is captured in a phosphate bond of ATP. The respiratory system is responsible for delivering sufficient oxygen to all cells of the body and for removing carbon dioxide (CO 2) that is produced as a waste product of cellular respiration. The respiratory system of insects (and many other arthropods) is separate from the circulatory system. It is a complex network of tubes (called a tracheal system) that delivers oxygen-containing air to every cell of the body. Air enters the insect’s body through valve-like openings in the exoskeleton. These openings (called After passing through a spiracle, air enters a longitudinal tracheole) provides a thin, moist interface for the exchange of gasses between atmospheric air and a living cell. Oxygen in the tracheal tube first dissolves in the liquid of the tracheole and then diffuses into the cytoplasm of an adjacent cell. At the same time, carbon dioxide, produced as a waste product of cellular respiration, diffuses out of the cell and, eventually, out of the body through the tracheal system. Each tracheal tube...

Table of Contents • • • • • • • What are the respiratory organs in insects called? The respiratory organ of the insects consists of a system of air-filled tubes, called the tracheae, which are in most cases in open connexion with the outside air through openings in the body wall, the spiracles. Do insects have respiratory organs? Most insects have a respiratory system akin to ventilation in a building. Tubes called tracheae run throughout their bodies delivering oxygen. The main airways get smaller as they branch off into their tissues. The tubes open to the outside air through vents called spiracles. What is tracheal respiration? Respiration takes place through the trachea and is named tracheal respiration. Centipedes, ticks, some mites, and spiders are some insects in which this type of respiration is seen. Tracheal system comprises tracheae and spiracles. A trachea is a system of strongly branched chitin-lined air tubes. What is the scientific name for water scorpion? Nepidae Nepidae/Scientific names What are the respiratory organs in cockroach and fish? Spiracles are openings on the surface of some animals, which usually lead to respiratory systems.• In the respiratory system of insects, the tracheal tubes primarily deliver oxygen directly into the animals’ tissues. The respiratory organs in cockroach are spiracles. What are respiratory organs in cockroach? The respiratory organ of cockroach is referred to as tracheae. The trachea is a dense array of a network of air t...

The correct option is A The cells exchange O 2 / C O 2 directly with the air in the tubes If the exchange of gases between the body cells and oxygen takes place directly, it is known as direct respiration. Insects have a network of tubes (tracheal tubes) to transport atmospheric air within the body. These openings lead to trachae. The cell exchange O 2 / C O 2 directly with the air. Q. Respiration in insects is called direct because (a) the cells exchange O 2 / C O 2 directly with the air in the tubes (b) the tissues exchange O 2 / C O 2 directly with the air in the tubes (c) the tissues exchange O 2 / C O 2 directly with the air outside through body surface (d) tracheal tubes exchange O 2 / C O 2 directly with the haemocoel which then exchange with tissues