Essay on Aquatic Animals - Essay Topics.

Exoskeletons first developed in the aquatic environment in ancient arthropods. Animals with this type of skeleton include crustaceans like crabs and lobsters. Figure 6.2: Crustaceans, such as this crab, developed a protective exoskeleton.

Examples of animals with exoskeletons include insects such as grasshoppers and cockroaches, and crustaceans such as crabs and lobsters, as well as the shells of certain sponges and the various groups of shelled molluscs, including those of snails, clams, tusk shells, chitons and nautilus.

The exoskeleton found on animals like clams is made of calcium carbonate, while the exoskeleton found on insects is partially made of chitin, a kind of polysaccharide. A polysaccharide is a chain.

A hard exoskeleton: The exoskeleton of an arthropod is made of a strong polysaccharide called chitin. This hard shell protects the animal, retains moisture, and sometimes even plays a role in reproduction. Compound eyes: Compound eyes allow arthropods to take in their environment in a variety of ways. Arthropods can see through a very wide lens.

Even the largest living animal with an internal skeleton (the blue whale) and the largest without a skeleton (e.g. the lion’s mane jellyfish) are aquatic, so the support provided by water helps ALL creatures reach larger sizes, not just those with exoskeletons.

The word arthropoda means jointed foot. It is the largest group of animals comprising of about 700000 species. The animals of this phylum are found all over the world in all climates and conditions. Characteristics. Body is metamerically segmented. Body is jointed outwardly and bilaterally symmetrical. A hard, non- living, exoskeleton is present.

Start studying Chapter 12 Review Science. Learn vocabulary, terms, and more with flashcards, games, and other study tools.. Compare the roles of endoskeletons and exoskeletons in providing animals with protection. and books lungs and aquatic animals uses gills. Describe how diffusion helps animals exchange gases. an aquatic animal so it.

Animal rights Animals like humans have feelings and suffer too. They both have a life valued to them. They both need protection in the form of laws or any way possible. Just like human beings animals too have fundamental rights protecting them against suffering. The rights also ensure that their lives are protected and nothing not even people should take it.

Aquatic animals live in water. There are various types of aquatic animals that each have their own specific characteristics.. Aquatic Animals Information: Lesson for Kids.. Analytical Essay.

Arthropod - Arthropod - Classification: Modification, specialization, number, and appearance of body segments and appendages (especially anterior ones such as antennae and mouthparts) are important criteria in distinguishing arthropod classes. Other structural features of taxonomic importance include location of the gonopores, structure of the head, and adaptations of the respiratory and.

Availability and importance of aquatic resources. Aquatic resources are fundamental to local livelihoods in Attapeu and are a key component in the well being of local people. Their livelihood strategies involve the use of multiple resources. AQUATIC ENVIRONMENTS. The study areas in Attapeu are characterized by a wide range of aquatic environments.

Most invertebrates, such as insects, spiders, and crustaceans, have outer skeletons called exoskeletons. Some aquatic animals, such as octopuses, sea anemones, and tunicates, and a number of small, land-dwelling invertebrates such as earthworms and velvetworms, have soft supporting structures called hydrostatic skeletons.