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The anatomy of spiders includes many characteristics shared with other arachnids. These characteristics include bodies divided into two tagmata (sections or segments), eight jointed legs, no wings or antennae, the presence of chelicerae and pedipalps , simple eyes , and an exoskeleton , which is periodically shed .
This image comes from the following images: File:Spider_internal_anatomy.png licensed with PD-US . 2009-06-27T01:33:45Z Kaldari 5000x2500 (10823835 Bytes) {{Information |Description={{en|1=Diagram of the internal anatomy of a two-lunged spider.}} |Source=Scanned from the 1920 edition of ''The Spider Book'', published by Doubleday, Page & Company (originally published in 1912)
English: Diagram showing the external anatomy of a pedipalp and leg of a spider. Date: 7 May 2017: Source: This file was derived from: Spider external anatomy.png:
This image is a derivative work of the following images: File:Spider internal anatomy-en.svg licensed CC by SA 3.0; File:Spider_internal_anatomy.png licensed with PD-US . 2009-06-27T01:33:45Z Kaldari 5000x2500 (10823835 Bytes) {{Information |Description={{en|1=Diagram of the internal anatomy of a two-lunged spider.}} |Source=Scanned from the 1920 edition of ''The Spider Book'', published by ...
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.
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In addition to preserving spiders' anatomy in very fine detail, pieces of amber show spiders mating, killing prey, producing silk and possibly caring for their young. In a few cases, amber has preserved spiders' egg sacs and webs, occasionally with prey attached; [93] the oldest fossil web found so far is 100 million years old. [94]
Highly simplified and stylized diagram of the main parts of an inflated palpal bulb, based loosely on Coddington (1990); [19] hardened parts shown darker, membranous parts shown lighter Palpal bulb (also called bulbus , palpal organ , genital bulb ): The copulatory organ of the male spider, carried on the modified last segment of the pedipalp ...