Exoskeletons Up Close: Exploring Arthropods with Merge Object Viewer

When students understand what defines arthropods and how scientists classify them, they begin to see the structure and logic behind biological diversity.

Exoskeletons Up Close: Exploring Arthropods with Merge Object Viewer

Arthropods are everywhere.

They crawl across sidewalks, pollinate flowers, swim in oceans, and even live in the soil beneath our feet. In fact, arthropods make up the largest and most diverse group of animals on Earth. And yet, despite their abundance, students often struggle to understand what truly defines them.

🕷️ Is it the number of legs?

🪲 The presence of wings?

🦀 Their body segments?

With the Arthropods collection in Merge Object Viewer (Collection Code: P45NJK), students don’t just look at pictures of insects and crustaceans. They hold them. Rotate them. Inspect their anatomy from every angle. They begin comparing features and discovering what unites this incredibly diverse group of organisms.

And in the process, classification becomes an investigation rather than a memorization task.

0:00
/0:13

Discovering What Makes an Arthropod

When students first explore arthropods in textbooks, they often encounter a long list of vocabulary: exoskeleton, segmented body, jointed appendages, molting. While important, these terms can feel abstract without meaningful visualization.

Merge Object Viewer changes that experience.

As students launch the Arthropods collection and point their device at the Merge Cube, detailed 3D models appear in the palm of their hand. They can rotate a crab to inspect its jointed legs. They can zoom in on the body segments of an insect. They can examine the curved exoskeleton of an arachnid.

Instead of being told that arthropods have jointed appendages, students can see the joints bend. Instead of memorizing that they possess exoskeletons, they can visually distinguish the hard outer covering from internal skeletal structures in other animal groups.

The features that define arthropods become more obvious through observation.

Comparing and Contrasting Across Species

One of the most powerful aspects of this collection is the opportunity to compare and contrast organisms within the same phylum.

Students quickly notice differences. Some arthropods have six legs. Others have eight. Some have wings. Some live underwater. Some have antennae; others do not.

Shrimp
Shrimp are decapod crustaceans with elongated bodies and a primarily swimming mode of locomotion. Under a broader definition, shrimp may be synonymous with prawn, covering stalk-eyed swimming crustaceans with long narrow muscular tails (abdomens), long whiskers (antennae), and slender legs. Any small crustacean which resembles a shrimp tends to be called one. Shrimp are widespread and abundant. There are thousands of species adapted to a wide range of habitats. They can be found feeding near the seafloor on most coasts and estuaries, as well as in rivers and lakes. To escape predators, some species flip off the seafloor and dive into the sediment. They usually live from one to seven years. Shrimp are often solitary, though they can form large schools during the spawning season. https://en.wikipedia.org/wiki/Shrimp
Blue Crab
Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting
Centipede
Centipedes are predatory arthropods belonging to the class Chilopoda of the subphylum Myriapoda. Centipedes are elongated metameric creatures with one pair of legs per body segment. Most centipedes are generally venomous and can inflict painful bites, injecting their venom through pincer-like appendages known as forcipules. Despite the name, centipedes can have a varying number of legs, ranging from 30 to 354. Centipedes always have an odd number of pairs of legs, therefore, no centipede has exactly 100 legs. Centipedes have a wide geographical range, even reaching beyond the Arctic Circle.[4] They are found in an array of terrestrial habitats from tropical rainforests to deserts. https://en.wikipedia.org/wiki/Centipede

At first glance, they may appear unrelated.

But as students rotate and inspect each model, patterns begin to emerge. Segmented bodies repeat across species. Jointed legs appear again and again. The exoskeleton remains a constant trait.

This hands-on augmented reality experience helps students understand how classification works. They begin to grasp that scientists group organisms not by superficial traits, but by shared structural characteristics.

By holding and manipulating each model, students strengthen their ability to analyze anatomical structures and identify defining features — a foundational skill in life science.

0:00
/0:19

Making Microscopic and Small-Scale Life Visible

Many arthropods are small. Some are easily overlooked. Studying them in a classroom setting can be limited by specimen availability, preservation concerns, or magnification tools.

Merge Object Viewer provides the equivalent of thousands of dollars’ worth of digital teaching aids, allowing students to visualize life science concepts anytime and anywhere. The Arthropods collection enlarges these organisms, making intricate details visible and accessible.

Students can zoom in on body segmentation. They can inspect compound eye placement. They can observe the articulation points of legs and claws.

The ability to scale and rotate the models allows learners to interact with anatomy in ways that physical specimens often cannot provide. And because the Merge Cube provides a multisensory learning experience, students engage visual, tactile, and kinesthetic senses simultaneously.

Learning becomes immersive rather than passive.

Dragonfly
A dragonfly is an insect belonging to the order Odonata, infraorder Anisoptera. In Greek,
Flea
Flea, the common name for the order Siphonaptera, includes 2,500 species of small flightless insects that survive as external parasites of mammals and birds. Fleas live by consuming blood, or hematophagy, from their hosts. They lack wings, but have strong claws preventing them from being dislodged, mouthparts adapted for piercing skin and sucking blood, and hind legs extremely well adapted for jumping. They are able to leap a distance of some 50 times their body length, a feat second only to jumps made by another group of insects, the superfamily of froghoppers. Flea larvae are worm-like with no limbs; they have chewing mouthparts and feed on organic debris left on their host’s skin. https://en.wikipedia.org/wiki/Flea
Millipede
Millipedes are a group of arthropods of the class Diplopada, that are characterised by having two pairs of jointed legs on most body segments. Although the name
Centipede
Centipedes are predatory arthropods belonging to the class Chilopoda of the subphylum Myriapoda. Centipedes are elongated metameric creatures with one pair of legs per body segment. Most centipedes are generally venomous and can inflict painful bites, injecting their venom through pincer-like appendages known as forcipules. Despite the name, centipedes can have a varying number of legs, ranging from 30 to 354. Centipedes always have an odd number of pairs of legs, therefore, no centipede has exactly 100 legs. Centipedes have a wide geographical range, even reaching beyond the Arctic Circle.[4] They are found in an array of terrestrial habitats from tropical rainforests to deserts. https://en.wikipedia.org/wiki/Centipede

From Observation to Inquiry

As students explore the collection, natural questions arise.

Why do arthropods molt?

How does an exoskeleton protect the organism?

Why are arthropods so evolutionarily successful?

How do jointed appendages contribute to movement efficiency?

These questions open doors to deeper discussions about adaptation, survival, ecosystems, and biodiversity. The collection becomes more than a set of models — it becomes a catalyst for inquiry.

Students may begin grouping arthropods into insects, arachnids, crustaceans, and myriapods based on observable features. They might hypothesize about habitats based on anatomical adaptations. They may connect structure to function, analyzing how body design supports survival.

Because they are actively manipulating the models, their observations feel personal and authentic.

Mosquito
The mosquito life cycle consists of egg, larva, pupa, and adult stages. Eggs are laid on the water surface; they hatch into motile larvae that feed on aquatic algae and organic material. The adult females of most species have tube-like mouthparts (called a proboscis) that can pierce the skin of a host and feed on blood, which contains protein and iron needed to produce eggs. Thousands of mosquito species feed on the blood of various hosts vertebrates, including mammals, birds, reptiles, amphibians, and some fish; along with some invertebrates, primarily other arthropods. The mosquito’s saliva is transferred to the host during the bite, and can cause an itchy rash. In addition, many species can ingest pathogens while biting, and transmit them to future hosts. In this way, mosquitoes are important vectors of diseases such as malaria, yellow fever, Chikungunya, West Nile, dengue fever, filariasis, Zika and other arboviruses. https://en.wikipedia.org/wiki/Mosquito
Horseshoe Crab
Horseshoe crabs are marine and brackish water arthropods of the family Limulidae, suborder Xiphosurida, and order Xiphosura. Their popular name is a misnomer, as they are not true crabs. Horseshoe crabs live primarily in and around shallow coastal waters on soft sandy or muddy bottoms. They tend to spawn in the intertidal zone at spring high tides. They are commonly eaten in Asia and used as fishing bait. Given their origin 450 million years ago, horseshoe crabs are considered living fossils. However, in recent years, populations show decline due consequences of coastal habitat destruction and overharvesting. https://en.wikipedia.org/wiki/Horseshoe_crab
Stag Beetle
Stag beetles are a family of about 1,200 species of beetles in the family Lucanidae. Some species grow to over 12 cm (4.7 in), but most are about 5 cm (2.0 in). The English name is derived from the large and distinctive mandibles found on the males of most species, which resemble the antlers of stags. Male stag beetles use their jaws to wrestle each other for favoured mating sites or resources. Female stag beetles are usually smaller than the males. Their mandibles, though smaller, are much more powerful than the males. https://en.wikipedia.org/wiki/Stag_beetle
Wasp Spider
Argiope bruennichi (wasp spider) is a species of orb-web spider distributed throughout central Europe, northern Europe, north Africa, parts of Asia, and the Azores archipelago. Like all orb-weavers, this spider is not poisonous for us. The spider builds a spiral orb web at dawn or dusk, commonly in long grass a little above ground level, taking it approximately an hour. When a prey item is first caught in the web, Wasp spiders will quickly immobilise its prey by wrapping it in silk before consuming it. https://en.wikipedia.org/wiki/Argiope_bruennichi

Why This Collection Matters

Understanding arthropods is foundational to life science. These organisms play essential roles in ecosystems as pollinators, decomposers, predators, and prey. They influence agriculture, medicine, and environmental health.

When students understand what defines arthropods and how scientists classify them, they begin to see the structure and logic behind biological diversity.

Merge EDU engages students in STEM and science with digital 3D objects they can touch, hold, and interact with. The Arthropods collection demonstrates how abstract vocabulary and classification systems can become concrete through hands-on augmented reality.

Instead of memorizing definitions, students observe evidence and investigate.

Instead of seeing arthropods as only “bugs,” they begin to recognize them as one of the most successful animal groups in Earth’s history.

Arthropods
Explore this collection of arthropods to compare and contrast their features, and find what makes them part of this diverse group of animals.

Ready to bring arthropod anatomy to life in your classroom?

Open Merge Object Viewer and enter Collection Code P45NJK to explore the Arthropods collection — and let your students discover what truly makes this group of animals so diverse and remarkable.