Comparing Animals

How do different types of animals breathe? Select the correct words for each category. Mammals lungs only Amphibians lungs, gills, skin Insects spiracles Worms skin How do different types of animals reproduce? Select the correct words for each category. Mammals give birth to live young nurse their young internal fertilization and live birth Amphibians gooey eggs go through metamorphosis (egg, tadpole, adult) external fertilization and lay eggs in water Insects internal fertilization and lay eggs go through metamorphosis (egg, larva, pupa, adult) Worms hermaphrodites (each worm makes both eggs and sperm) external fertilization and lay eggs in dirt Match the type of animal with its and description. Mammals are endothermic (warm-blooded), have fur, and give birth to live young Amphibians are ectothermic (cold-blooded), have gooey eggs that must be in water, and go through metamorphosis Insects have internal fertilization, lay eggs, and go through metamorphosis Worms are hermaphroditic, and lays eggs Which of the following is a characteristic of ALL types of animals? sexual reproduction laying eggs internal fertilization external fertilization Which structure is unique to mammals? teeth hair backbone 4 limbs Fill in the blanks using the words in the word bank. The animal kingdom has organisms who are multiceullar, eukaryotic, and heterotrophic. Animals reproduce sexually. Some animals, like mammals and insects, do internal fertilization, which means that the egg is fertilized while it is inside of the female's body. Other animals, like amphibians, do external fertilization, which means that the egg laid and then fertilized outside of the female's body.Animals are heterotrophs, which means that must eat other organisms for nutrition. Animals digest their food internally.Different types of animals breathe using different organs. Mammals breathe using lungs. Adult amphibians breathe using lungs and their moist skin, while juvenile amphibians (like tadpoles) have gills. Insects use holes in their sides called spiracles to breathe. Worms breathe through their thin, moist skin.