Spider (Aranea): it is a cosmopolitan arachnid. It is carnivorous as well as feeds o insects, sow walking inwards locomotion as well as respires alongside the assist of mass lungs. Sexes are unisexual as well as demo dimorphism. Fertilization is internal as well as woman individual is oviparous. Eggs are seat inwards silken oothecae, Development is direct.
Body is divisible inwards 2 parts: cephalothorax as well as abdomen. Cephalothorax bears i couplet of pedipalpi, i pilus of chelicerae as well as four pairs of walking legs. The abdomen bears spinnerets to spin the silk thread to brand web.
Insects: It is the largest shape of animals as well as includes to a greater extent than than 750000 species. Body is divided into iii parts: head, chest as well as abdomen. Thorax ever has three pairs of jointed legs as well as thence called hexapoda. Thorax to a greater extent than oft than non has i or 2 pairs of wings. Habitat is variable. Respiration is yesteryear trachea. Excretion is yesteryear malpighian tubules. These convey i couplet of antennae.
Example of insects: Cockroach(Periplaneta), Silver fish (Lepisma), termite- White emmet (Microtreme), Honey bee (Apis), Headlouse(Pediculus), Rat flea (Xenopsylla), Silk moth(Bombayx mori), mosquito(Culex/ Anopheles)
Spider Vs Insect
| Spider | Insect |
| Body is divided into 2 parts: Cephalothorax as well as abdomen. | Body is divided into 2 parts: head, chest as well as abdomen. |
| Mouth parts: Have chelicerae as well as pedipalpi | Mouth parts: Have labrum, labium maxillae as well as mandibles. |
| Wings absent | Wings to a greater extent than oft than non present |
| Four pairs of legs | Three pairs of legs |
| Antennae absent | One couplet of antennae present |
| Spinnerets introduce on abdomen as well as used to shape spider web | Spinnerets absent |
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