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Stylised diagram of the last part of the insect's digestive tract showing malpighian tubule (orthopteran type)The Malpighian tubule system is a type of excretory and osmoregulatory system found in some insects, myriapods, arachnids and tardigrades.
The digestive juices rapidly turn the prey into a broth of nutrients, which the arachnid sucks into a pre-buccal cavity located immediately in front of the mouth. Behind the mouth is a muscular, sclerotised pharynx , which acts as a pump, sucking the food through the mouth and on into the oesophagus and stomach .
Download QR code; Print/export Download as PDF; Printable version; In other projects ... Arachnid anatomy (1 C, 15 P) Arachnids by year of formal description (3 C) C.
The cephalothorax, also called prosoma, is composed of two primary surfaces: a dorsal carapace and a ventral sternum.Most external appendages on the spider are attached to the cephalothorax, including the eyes, chelicerae and other mouthparts, pedipalps and legs.
Arachnid locomotion is the various means by which arachnids walk, run, or jump; they make use of more than muscle contraction, employing additional methods like hydraulic compression. [ 1 ] [ 2 ] Another adaptation seen especially in larger arachnid variants is inclusion of elastic connective tissues .
Download QR code; Print/export Download as PDF; Printable version; ... Other arachnologists perform research on the anatomy or physiology of arachnids, including the ...
Close-up of the chelicerae of a harvestman. The chelicerae consist of three segments, with the distal two forming a pincer [3] equipped with a row of teeth. Based on developmental gene expression data, the proximal segment is thought to be homologous to the femur and patella of the legs, the middle segment to the tibia through the tarsus of the legs, and the distal segment to the apotele (the ...
Ricinulei is a small order of arachnids.Like most arachnids, they are predatory; eating small arthropods.They occur today in west-central Africa and the Americas (Cryptocellus and Pseudocellus) from South America to as far north as Texas, where they either inhabit leaf-litter or caves.