Grasshoppers have 3 regions-- the head, the thorax, and abdomen. The head contains the mouth, antenna, and the eyes. The thorax contains the 2 walking legs and the 2 jumping legs. It also contains the forewings and the hind wings. The Abdomen contains the Spiracles (small openings on the side of somites or body segments), Auditory Organs (two located laterally on the 1st body somite or segment), and Ovipositor (on female).
Grasshoppers are very symmetrical and segmented. Grasshoppers have a skeleton like Porifera and Annelida. Arthropods have a segmented body, a tough exoskeleton, and jointed appendages. When they outgrow their exoskeletons, arthropods undergo periods of molting.
Groups of Arthropods:
Arthropods are classified based on the number and structure of their body segments and appendages-- particularly their mouth parts. Crustaceans typically have two pairs of antennae, two or three body sections, and chewing mouth parts called mandibles. Crayfishes, lobsters, and crabs are all members of the largest group of crustaceans: the decapods. The barnacles are another group of crustaceans.
Evolution of Arthropods:
The evolution of arthropods, by natural selection and other processes, has led to fewer body segments and highly specialized appendages for feeding, movement, and other functions. Arthropod appendages also evolved into different forms that are adapted in ways that enable them to perform different functions. Antennae, claws, walking legs, wings, flippers, mouth parts, tails, and other specialized structures are all included in the appendages.
Grasshoppers are very symmetrical and segmented. Grasshoppers have a skeleton like Porifera and Annelida. Arthropods have a segmented body, a tough exoskeleton, and jointed appendages. When they outgrow their exoskeletons, arthropods undergo periods of molting.
Groups of Arthropods:
Arthropods are classified based on the number and structure of their body segments and appendages-- particularly their mouth parts. Crustaceans typically have two pairs of antennae, two or three body sections, and chewing mouth parts called mandibles. Crayfishes, lobsters, and crabs are all members of the largest group of crustaceans: the decapods. The barnacles are another group of crustaceans.
Evolution of Arthropods:
The evolution of arthropods, by natural selection and other processes, has led to fewer body segments and highly specialized appendages for feeding, movement, and other functions. Arthropod appendages also evolved into different forms that are adapted in ways that enable them to perform different functions. Antennae, claws, walking legs, wings, flippers, mouth parts, tails, and other specialized structures are all included in the appendages.