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Invertebrate animals 4º
- 2. Characteristics of animals Animals have some characteristics in • Animals eat other living things • Nearly all of them can move from one place • Some animals are oviparous. They lay eggs • Some animals are viviparous. They give bir • Animals have internal parts called organs, form systems that carry out vital functions
- 3. Classifying animals We can classify animals in different wa We classify animals according to the type of food they eat in ….. Herbivores Carnivores omnivores We classify animals according to the way they reproduce. Oviparous Viviparous One of the most com ways to classify an whether or not the internal skeleton. Vertebrate Invertebra https://www.youtube.com/watch?v=rzxFTrktN1c
- 4. Invertebrates • Invertebrate animals do not have inte • Invertebrate animals are all oviparou
- 5. We classify invertebrate animals as: Sponges Jellyfish Worms Arthropods Mulluscs Echinoderms
- 7. Sponges • Sponges live at the botton of the s • Sponges are fixed to the ground so they cannot move around. • Their body is full of pores (holes) • Food and water enter their body thr pores.
- 9. Jellyfish •Jellyfish can be very dangerou •jellyfish have poisonous tenta •Jellyfish use their tentacles to defend themselves.
- 10. WORMS
- 11. Worms • Worms have a long soft segmented body . • Their body is made up of rings. • Some worms live in the ground. • Other worms live in water.
- 12. Arthropods • Arthropods are the biggest and most important group of inverte • All arthropods have an interna • skeleton that protects their • Arthropods have many legs.
- 16. Insects • Insects are the largest group of arthropods. • Their body is divided into three parts head, thorax and abdomen. • They have two antennae . • Some insects have wings. dragonfly
- 17. A fly is an insect because it has
- 18. https://www.youtube.com/watch?v=QKr-s3vSgf0 A VARIETY OF GRASSHOPPER
- 19. Arachnids • Their body is divided into two cephalothorax and abdomen. • The cephalothorax is formed by head and thorax combined. • Arachnids don´t have antennae
- 21. Other Arachnids
- 22. Crustaceans •The majority of crustaceans h •body divided into two parts : Cephalothorax and abdomen. •Crustaceans have two antennae •Crustaceans don´t have Wings.
- 23. A lobster is a crustacean. Claw
- 24. Other examples of crustaceans scampiSpiny lobster lobster crayfish crab shrimp
- 25. MOLLUSCS SQUID OCTOPUS Molluscs with internal shell Molluscs without internal shell
- 26. Molluscs •Some molluscs are terrestrial an •Some molluscs are aquatic and li •All molluscs have soft bodies. •Nearly all molluscs have a shell
- 28. MOLLUSCS CLAMS MUSSEL Molluscs with two she ( shell)
- 29. MOLLUSCS SNAIL Mollscs with one she
- 32. Echinoderms •Starfish and sea urchins • are echinoderms. •They have many small feet that t use to move along the botton of Botton of the o