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The timing and duration of spiracle closures can affect the respiratory rates of the organism. [5] Spiracles may also be surrounded by hairs to minimize bulk air movement around the opening, and thus minimize water loss. In larger insects, spiracle control is more complex and critical for managing gas exchange due to their higher metabolic demands.
Insects have spiracles on their exoskeletons to allow air to enter the trachea. [1] [page needed] In insects, the tracheal tubes primarily deliver oxygen directly into the insects' tissues. The spiracles can be opened and closed in an efficient manner to reduce water loss. This is done by contracting closer muscles surrounding the spiracle.
The following 11 pages use this file: Arthropod head problem; Insect; Insect morphology; Suboesophageal ganglion; Supraesophageal ganglion; Ventral nerve cord; Wikipedia:Featured picture candidates/Insect anatomy diagram; Wikipedia:Featured picture candidates/May-2014; Template:Image key; Template:Image key/doc; Portal:Insects
During the closed phase of discontinuous gas exchange cycles, the spiracle muscles contract, causing the spiracles to shut tight. At the initiation of the closed phase, the partial pressure of both O 2 and CO 2 is close to that of the external environment, but closure of the spiracles drastically reduces the capacity for the exchange of gases with the external environment. [2]
Stylized diagram of insect digestive tract showing malpighian tubule, from an insect of the order Orthoptera. The first section of the alimentary canal is the foregut (element 27 in numbered diagram), or stomodaeum. The foregut is lined with a cuticular lining made of chitin and proteins as protection from tough food.
In this spider diagram, the position of the book lungs is labelled 1. Spider book lungs (cross section) Internal anatomy of a female spider, book lungs shown in pink A book lung is a type of respiration organ used for atmospheric gas-exchange that is present in many arachnids, such as scorpions and spiders.
The forelegs are reduced in the Nymphalidae Diagram of an insect leg. The thorax, which develops from segments 2, 3, and 4 of the larva, consists of three invisibly divided segments, namely prothorax, metathorax, and mesothorax. [11] The organs of insect locomotion – the legs and wings – are borne on the thorax.
Original – Anatomic Diagram of an insect; individual labels are in the article and on the description page Old PNG Reason Highly educational, with good EV Articles in which this image appears Insect morphology, insect FP category for this image Wikipedia:Featured pictures/Diagrams, drawings, and maps/Diagrams Creator Piotr Jaworski