What is the classification of invertebrates?

Invertebrate, arthropod or insect? This Monarch caterpillar is an invertebrate. It is also an insect and an arthropod. Of all the animal species, it is estimated that well over 90% are invertebrates. Of all invertebrates, the insects are by far the most numerous. read more

Invertebrates cells fire in response to similar stimuli as mammals, such as tissue trauma, high temperature, or changes in pH. The first invertebrate in which a neuron cell was identified was the medicinal leech, Hirudo medicinalis. Learning and memory using nociceptors in the sea hare, Aplysia has been described. read more

There are different types of animals around us. The large number of animals in the world can be broadly classified into two groups on the presence and absence of the backbone.: Vertebrates (Animals with backbone), Invertebrates (Animal without backbone). read more