Presentation on theme: "Classifying Animals Vertebrates and Invertebrates"— Presentation transcript:
1Classifying Animals Vertebrates and Invertebrates Mrs. Christman
2Objective Explore how to classify animals. Understand that animal cells are organized into tissues, organs, and systems.Describe observable characteristics of vertebrates and invertebrates.Classify animals by using a key.
3Main IdeaWhile all animals’ cells have similar basic structures, the specific structure and function of these cells are very diverse. The more cells, tissues, organs, and systems that organisms have in common or that are similar, the more closely related they are.
4Vocabulary tissue-similar cells that have the same job or function organ- a group of tissues that work together, like a heart or brain.system- a group of organs that work together to do a certain job. For example, a mouth, stomach, and intestines make up the digestive system of an animal.
5Classifying AnimalsScientists classify animals based on cell structure, how cells are organized into tissues, how tissues are organized into organs, and how organs are organized into systems.
6Classifying AnimalsScientists look at the similarity of certain traits to classify animals.For example, at first glance a bat and an eagle may seem more alike than a bat and a cat. However, a bat and an eagle are very different.The bat and cat are both mammals. Both have hair and both feed their young mother’s milk.Birds on the other hand, are not mammals. Birds do not have fur and do not fee their young mother’s milk.
7Vertebrates and Invertebrates Animals are divided into two large groups.One group is made up of animals that have backbones (vertebrates)The second group are animals that do not have a backbone. They are called invertebrates.
8Sponges One of the simplest kinds of animals is a sponge. Belong to a group called Porifera.Have tissues but no organs. No stomach, mouth, or other organsBody is covered with pores (holes)Most live in oceans
9Invertebrates with Stinging Cells Belong to Cnidaria groupThey have tentacles-long threadlike structures that make poisons.They have a mouthThey live on the ocean floorjellyfishSea anemonecoral
10Flatworms Belong to a group Platyhelminthes Have flat bodies Have heads and tailsMost flatworms do not have true organ systemsFlatworm
11Roundworms Belong to a group Nematoda Have heads and tails Unlike flatworms, roundworms have round bodies, a digestive systems, and a simple nervous system.Live all over earth, inside plants, and animalsSome worms can grow to 30 METERS longRoundworms
12Earth Worms Belong to a group called segmented, or Annelida Have heads and tails. Many segmented worms have eyes and other specialized organs, such as jaws or gillsHave circulatory, digestive, and nervous systemsThey can grow back parts if they lose parts.An earthworm has hairs on it to help it go through the dirt
13Invertebrates with Soft Bodies octopusSnails, clams, and octopuses belong to the mollusks groupMost have a shell either inside or outside their body. They make their shells from minerals in the water.Have three main body parts, a kind of foot, a tissue covering called a mantel, and a compartment holding internal organs.snailsquid
14Invertebrates with Soft Bodies octopusThey live on land and fresh water and ocean water.They have gills for breathing.They have jaws or other organs for capturing food.Have a circulatory system. More complex mollusks, like octopuses, have a well-developed brain.snailsquid
15Invertebrates with Spiny Skins Unlike arthropods, the Echinodermata, or echinoderms, have a skeleton inside their bodiesThey have bodies with at least 5 sectionsThey have suction cup feet to walkThey use tubes to catch food to.
16Arthropods There are 4 groups There are more arthropods on Earth than any other kind of animal.
17Arthopods They have keen sense organs They have exoskeletons, a tough outer skeleton.They have jointed legs, and a body made up of two, three, or more sections.
18Crustaceans They have five pairs of legs They live near or on the ocean floorLive on land and waterThey have antennae
19Arachnids Spiders mites and ticks. 4 pairs of legs Most live on land. Some live in fresh waterThey are called parasites.
20Insects Largest group of arthropods 3 pairs of legs 3 main body part sections2 pairs of eyesHave mouths
21Millipedes & Centipedes Many body segmentsLive under rocks & dark placesReally have less than 100 legsProtects itself by curling upMillipedes have 4 legs on each segmentCentipedes have 2 legs on each segmentmillipedecentipede