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

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

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

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

Class of arthropods that comprises Centipedes.

Enzymes responsible for breaking down chitinous exoskeletons.

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

Insect order that comprises: Cockroaches,Mantids and Termites.

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

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