What is the definition of Arthropoda?

Arthropoda:

1. An arthropod is a type of creature that has many joints, a chitinous exoskeleton, divisions, and an open circulatory system.
2. The organisms' internal organs are protected by their strong exterior exoskeleton.
3. It also acts as a site of attachment for the muscles of organisms, especially arthropods with active appendages.
4. Exoskeletal layers of chitin and proteins make up the exoskeleton of arthropods.
5. The specialization of structures and organs in arthropods is accounted for by segmentation.
6. Segments also serve as a location for arthropods to develop their many limbs or appendages.
7. Sensation, movement, copulation, nutrition, and other activities are all performed by these appendages.