They have muscles like us, except theirs are smaller and are connected to the inside of their exoskeletons, instead of wrapping around the endoskeleton like we have.
All insects present an exoskeleton, so all insects are arthropods.
Barnacles are crustaceans( a type of arthropods)
Compound Eyes
polysaccharides
Arthropods have an exoskeleton made of chitin, which provides structural support and protection while allowing for mobility through jointed appendages. In contrast, humans possess an endoskeleton made of bone, which is internal and supports the body while allowing for growth and healing. The exoskeleton of arthropods must be periodically molted to accommodate growth, whereas the human skeleton grows continuously with the body. Additionally, arthropods rely on muscles attached to the exoskeleton for movement, while humans have muscles attached to bones.
They are invertabrates. Some person on this site said that they are arthropods, but he/she is definetly wrong. They are closely related on the phylum tree, but they aren't exactly arthropods. They are invertabrates. Ps. arthropods are a type of invertabrate. :)
All insects are arthropods. The phylum Arthropoda contains the classes Insecta (insects), Crustacea (crabs, lobsters, etc), Chelicerata (arachnids) and a few others.
cardiac muscles
which type of muscles cannot be contolled
It is not likely that the annelids evolved from the arthropods is as much as they are the much simpler of the two groups of organisms. The arthropods have a well developed open circulatory system, segmented muscles and a complex nervous system (including eyes and chemoreceptors, the antennae) and an exoskeleton.
voluntary muscles
Involuntarily controlled muscles