Chapter 28 Biology

Created by Marley12295 

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29 terms

exoskeleton

the exterior protective or supporting structure or shell of many animals (especially invertebrates) including bony or horny parts such as nails or scales or hoofs

chitin

a tough semitransparent horny substance

appendage

a part that is joined to something larger

tracheal tube

one of many branching, air-filled tubes that extend throughout the bodies of many terrestrial arthropods

spiracle

a breathing orifice

book lung

organ in many arachnids containing many thin folds of membrane resembling the leaves of a book

Malpighian tubule

saclike organ in most terrestrial arthropods that extracts wastes from the blood, adding them to feces that move through the gut

molting

periodic shedding of the cuticle in arthropods or the outer skin in reptiles

cephalothorax

region of a crustacean formed by the fusion of the head with the thorax

thorax

part of an insect's body that bears the wings and legs

abdomen

the region of the body of a vertebrate between the thorax and the pelvis

carapace

hard outer covering or case of certain organisms such as arthropods and turtles

mandible

the lower jawbone in vertebrates

cheliped

one of the first pair of legs of decapods

swimmeret

one of the paired abdominal appendages of certain aquatic crustaceans that function primarily for carrying the eggs in females and are usually adapted for swimming

chelicera

either of the first pair of fang-like appendages near the mouth of an arachnid

pedipalp

pair of mouthparts in chelicerates that are usually modified to grab prey

spinneret

organ in spiders that contains silk glands

incomplete metamorphosis

insect development consisting of three stages: egg, nymph, and adult

nymph

a larva of an insect with incomplete metamorphosis (as the dragonfly or mayfly)

complete metamorphosis

Insect development consisting of four stages: egg, larva, pupa, and adult

pupa

an insect in the inactive stage of development (when it is not feeding) intermediate between larva and adult

pheromone

a chemical substance secreted externally by some animals (especially insects) that influences the physiology or behavior of other animals of the same species

society

an extended social group having a distinctive cultural and economic organization

caste

a social class separated from others by distinctions of hereditary rank or profession or wealth

endoskeleton

the internal skeleton

water vascular system

system of fluid-filled tubes used by echinoderms in locomotion and feeding and respiration

tube foot

tentacular tubular process of most echinoderms (starfish and sea urchins and holothurians) having a sucker at the end and used for e.g. locomotion and respiration

madreporite

sievelike structure through which the water vascular system of an echinoderm opens to the outside

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