Summary:
- Most members of the subphylum Hexapoda are insects.
- They range in length from less than a millimeter to about the length of your arm.
- They have a head, thorax, and abdomen.
- Like other arthropods, insects have a head, thorax, and abdomen.
- They have a pair of antennae for smelling and tasting chemicals.
- Insects are the only invertebrates that can fly and reproduce sexually.