BIOL 2325 Lecture Notes - Lecture 6: Book Lung, Pedipalp, Sea Spider
Document Summary
Exploit every available habitat and food source. Cuticular exoskeleton contains chitin and sclerotized protein. 2 tagmata, 1 pair chelicerae, 1 pair pedipalps, 4 pairs of walking legs. Digestive tract in abdomen, gonads in legs. Chelicerae used as fangs with bear ducts from venom glands. Spiders have teeth at the base of their chelicerae to chew prey. Book lungs are air pockets that extend into blood filled chambers. Silk is a liquid protein secretion used for webs etc. For mating, pedipalp inserted into genital opening, semen is stored in receptacle untill egg is ready. Head has 2 antennae, mandibles, and 2 pairs of maxillae. 2 pairs of appendages on each segment. Carapace-dorsal cuticle of head that extends to cover some thoracic and abdominal segments. Classes: insecta(mouthparts visible) and entognatha(base of mouthparts within head capsule) 3 pairs of legs, 2 pairs of wings.
