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Most external appendages on the spider are attached to the cephalothorax, including the eyes, chelicerae and other mouthparts, pedipalps and legs. Like other arachnids, spiders are unable to chew their food, so they have a mouth part shaped like a short drinking straw that they use to suck up the liquefied insides of their prey.
The part closest to and attaching the leg to the cephalothorax is the coxa; the next segment is the short trochanter that works as a hinge for the following long segment, the femur; next is the spider's knee, the patella, which acts as the hinge for the tibia; the metatarsus is next, and it connects the tibia to the tarsus (which may be thought ...
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)
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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The underside and head of a female ecribellate entelegyne spider. Abdomen or opisthosoma: One of the two main body parts , located towards the posterior end; see also Abdomen § Other animals; Accessory claw: Modified setae at the tip of the tarsus in web-building spiders; used with tarsal claws to grip strands of the web [1]