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Arachnids

Arachnids are invertebrates that have eight legs. Spiders,mites,scorpions and ticks are all arachnids. These invertebrates have no wings or antennae.

Basal Lamina

Extracellular matrix secreted by epithelial cells. Found on the integument of insects.

Carnoy's Fixative

A tissue fixative comprised of ethanol,acetic acid and chloroform. Used for glycogen preservation and nucleic acids. This fixative is sometimes used for insect tissue.

CD45

Cluster of differentiation 45. A tyrosine phosphatase. Sometimes used to identify osteoblasts.

CD68

Cluster of differentiation glycoprotein. Used for osteoclast differentiation in IHC assays.

Chilopoda

Class of arthropods that comprises Centipedes.

Chitinases

Enzymes responsible for breaking down chitinous exoskeletons.

Coleoptera

The order of insects that comprises beetles. This is the largest insect order with the highest number of known species.

Collagen I

The most abundant type of collagen. Found in skin,tendon,scar tissue,bones & teeth.

Collagen II

Found in hyaline cartilage.

Collagen III

Produced by growing fibroblasts and found in granulation tissue.

Collagen IV

The collagen of basil lamina.

Dictyoptera

Insect order that comprises: Cockroaches,Mantids and Termites.

Diptera

Insect order that contains flies and mosquitos. Species in this order contain a single pair of wings.

Epigynum

Found only on adult female spiders (abdominal region) and part of the reproductive organs.

Formalin

A saturated solution of formaldehyde (usually a 10% solution). Primarily a commercial preparation that includes a small amount of methanol.

Hymenoptera

The order of insects that comprises ants,bees,sawflies and wasps.

IHC

Acronym for immunohistochemistry.

ISH

Acronym for In situ hybridization.

Melanin (Insect)

An insoluble polymer derived from amino acids that produce dark pigments in insects.

Mesothelae

A suborder of spider only found in parts of southeastern Asia and Japan.

Mineral Apposition rate (MAR)

A derived parameter used to gauge bone formation.

Myoblasts

Muscle forming cells

Myocytes

The principle cells of muscles.

Opisthothelae

Suborder of spiders of which most spiders belong.

Orthoptera

Order of insects comprising crickets and grasshoppers.

Osteoblasts

Bone cells responsible for bone formation.

Osteocytes

Mature bone cells located in bone matrix.

Paraformaldehyde

A polymer or condensation product of formaldehyde.

Pedicel

The stem-like structure supporting an organ. In spiders,this structure connects the prosoma and opisthosoma.

Proteoglycan

Proteoglycans are a class of glycoprotein. They are a found in animal extracellular matrix. Examples: Cartilage and skin.

RNAi

RNA interference which assists in gene control and activity.

SEM

Acronym for Scanning Electron Microscopy.

Tarsus

The most distal segment of the legs ,which bears the foot and claw at the tip.

TEM

Acronym for Transmission Electron Microscopy.

Tenocytes

The collagen producing cells in tendons.

Triglyceride

In insects,triglycerides are the lipid-storing organs.