The bugs are small because that's how they survive and adapted to their environment
Aphids are small insects with soft bodies.
Insects, such as grasshoppers, have small holes on their bodies called spiracles. These holes are utilized for breathing. The circulatory and respiratory systems in insects are kept separate.
ticks
All insects have a tracheal system of air tubes rather than a complex lung based respiratory system. These air tubes allows the insects to breathe without weighing down their small bodies with complicated organs.
There are no insects that have two legs. All insects have six legs and most insects have wings on their bodies.
For mosquitos and insects
A hard shell on them.
Insects are exoskeletol. They have armor like bodies or hard shells
Insects belong to the arthropoda phylum. Insects are arthropods, which are invertebrates and have segmented bodies and have jointed appendages.
An insect's body help it maintain life. Spiders have many legs so that they can weave webs. Flies have small bodies so that they can fly easy.
Bed bugs are small, brownish insects (1) with flat, oval-shaped bodies. Young bed bugs can be no bigger than a pinhead.
Depends on the bug. Some can, some can't. Most insects have small hairs covering their bodies that can detect vibrations in the air from motion to sound.