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Animal

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Anne Shin

on 29 April 2010

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Transcript of Animal

Amphibians
Amphi- meaning "on both sides" and -bios meaning "life" frogs, toads, salamanders, newts, and caecilians Arthropoda Aves Crustacean mammal Reptile
Insect Mollusca Arachnia
Echinoderm Echinoderms have a few important aspects in common. They have bony ossicles in their body. They have a water-vascular system which pumps water through the madroporite. They also have small jaws that are supported by the water-vascular system. And they have tube feet which they use to attach to objects, for protection, as well as to obtain food. They have radial symmetry and most can regenerate lost limbs.

They are divided into five subgroups:
Crinoidea, Asteroidea, Ophiuroidea,
Holothuroidea, and Echinoidea. Echinoderms are marine animals that live in the ocean. Common echinoderms include the sea star, sea urchin, sand dollar and sea cucumber. Most echinoderms have arms or spines that radiate from the center of their body. The central body contains their organs, and their mouth for feeding. Stars can dance too! The Mollusca, common name molluscs or mollusks is a large phylum of invertebrate animals. There are around 85,000 recognized extant species of molluscs. It is the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. Molluscs are highly diverse, not only in size and in anatomical structure, but also in behaviour and in habitat. Molluscs have adopted a wide range of feeding habits: some feed on detritus from plant and animal remains; others filter food particles from water; others are herbivores browsing on algae; yet others are carnivorous hunters. Mammals are everywhere! There are mammals in the water, on land, in the air, and even mammals who live underground. All mammals are warm-blooded and have some type of hair or fur. Most will give birth to live young instead of laying eggs. Female mammals produce milk to feed their young. Mammals also have a backbone (they are vertebrates, cooling glands on the skin, and complex internal organs.

Reptiles are animals in the (Linnaean) class Reptilia characterized by breathing air, a "cold-blooded" (poikilothermic) metabolism, laying tough-shelled amniotic eggs (or retaining the same membrane system in species with live birth), and skin with scales or scutes. Birds (class Aves)
are winged,
bipedal,
endothermic
(warm-blooded), egg-laying, vertebrate animals. There are around 10,000 living species, making them the most numerous tetrapod vertebrates. Crustaceans (Crustacea) form a very large group of arthropods, usually treated as a subphylum, which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill and barnacles. The Kingdom Arthropoda is made up of animals that have an exoskeleton that allows for increased movement and protection, segmented bodies, and paired jointed appendages. This Phylum included insects, centipedes, scorpians, spiders and crustaceans, among others (Class notes). Arachnids are a class (Arachnida)
of joint-legged invertebrate animals
in the subphylum Chelicerata.
All arachnids have eight legs,
although in some species the front pair
may convert to a sensory function.
The term is derived from the Greek word
(aráchnē), meaning "spider".[2] Insects (from Latin insectum, a calque of Greek [éntomon], “cut into sections”) are a class within the arthropods that have a chitinous exoskeleton, a three-part body (head, thorax, and abdomen), three pairs of jointed legs, compound eyes, and two antennae.
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