They're advanced over their ancestors - worms - by having that new and useful sructure, the articulated leg.
goods
Arthropods are animals or insects with a hard exoskeleton and segmented bodies. Crustaceans such as shrimp, crabs and lobsters are classified as arthropods, and are eaten in most countries throughout the world.
they take up 75% of it
The Aztecs were considered an advanced civilization, because they had language and government.
For one thing they eat other bugs, Spiders are considered lucky for that reason, even though some are horrified by them. These arthropods are part of the ecosystem where everything has a purpose. Arthropods are also very good and nutritious to eat.
Books lungs are lung like organs found in arthropods. They function much like advanced lungs by exchanging atmospheric gases. Pockets of hemolymph pool in the lungs and are saturated by gases.
Snails are gastropods, and are not even related to insects (which are arthropods).
The arthropods are by far the most successful phylum of animals, both in diversity of distribution and in numbers of species and individuals. They have adapted successfully to life in water, on land and in the air.
They express the characteristics inherent to arthropods. All insects are arthropods. Not all arthropods are insects.
Squid are considered more advanced than clams.
NO Mammals are not arthropods. Arthropods are insects.
Highly advanced cultures are defined by their medical, social, and educational advances. Japan is considered to be a highly advanced culture.