1/20/2024 0 Comments Wordament animal groups![]() Coelenterates are also very primitive.They live in water (usually saltwater), are sessile (do not move from place to place), and filter tiny organisms out of the water for food. Sponges are the most primitive of animal groups.Mammals are warm-blooded, and are nourished by their mothers' milk most are born live (however, the platypus lays eggs).They lay eggs, and most can fly (although many, including penguins and ostriches, cannot). Birds are warm-blooded animals with feathers and wings.Dinosaurs were reptiles, although some scientists believe that some were warm blooded. Reptiles include snakes, turtles and tortoises, crocodiles and alligators, and lizards. ![]() Reptiles are cold-blooded and breathe with lungs.Caecilians are primitive amphibians that resemble earthworms. Three types of amphibians are frogs and toads, salamanders, and caecilians. Amphibians are cold-blooded and live both on land (breathing with lungs) and in water (breathing through gills) at different times.Fish breathe through gills, and live in water most are cold-blooded and lay eggs (although sharks give birth to live young).However, there are many more invertebrates than vertebrates. Vertebrates are often larger and have more complex bodies than invertebrates. Adult vertebrates have a spinal column, or backbone, running the length of the body invertebrates do not. Cold-blooded animals depend on their surroundings to establish their body temperatures.Īlmost all animals fall into one of two groups. Warm-blooded animals regulate their own body temperatures their bodies use energy to maintain a constant temperature.
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