Invertebrates

WITHOUT BACKBONE

1. INVERTEBRATES Animals without a Backbone or Spinal Column:

2. INVERTEBRATE ANIMALS Different Phyla 1. ARTHROPODA 3. MOLLUSCA 8. CNIDARIA/ COELENTERATES 7. PORIFERA 6. PLATYHELMINTHES 5. NEMATODA 2. ECHINODERMATA 4. ANNELIDA

3. INVERTEBRATE Characteristics of Each Groups of Invertebrate Arthropoda Means jointed legs They have no bones but they have a hard outside covering called exoskeleton which serve as protection or support.

4. ARTHROPODA CRUSTACEAN INSECTA ARACHNIDA CHILIPODA DIPLOPODA

5. Arthropoda ) are the largest phylum of  animals  and include the  insects ,  arachnids ,  crustaceans , and other similar creatures. Insects- Insects are generally small in size and possess segmented bodies supported by an  exoskeleton  made mostly of  chitin . The body is divided into a head, a  thorax , and an  abdomen . The head supports a pair of sensory  antennae , a pair of compound eyes  as well as the mouth; the thorax has  six  legs (one pair per segment) and wings (if present in the species). The abdomen has  excretory  and reproductive structures.

6. Arthropoda ) are the largest phylum of  animals  and include the  insects ,  arachnids ,  crustaceans , and other similar creatures. Arachnids The arachnids are easily distinguished from the  insects  by the fact that they have eight legs instead of six.

7. Arthropoda ) are the largest phylum of  animals  and include the  insects ,  arachnids ,  crustaceans , and other similar creatures. Crustaceans They include various familiar animals, such as  lobsters ,  crabs ,  shrimp  and  barnacles . They are variously found in marine and freshwater, with a few terrestrial members

8. Characteristics of Each Groups of Invertebrate ECHINODERMATA Means spiny skinned animals Their hard bodies are covered with spines and have a design know as radial symmetry

9. Characteristics of Each Groups of Invertebrate MOLLUSCA Means soft bodied animals They have soft bodied and are shapeless.

10. Characteristics of Each Groups of Invertebrate ANNELIDA Means segmented worms They live in fresh and marine water as well in the soil.

11. Characteristics of Each Groups of Invertebrate NEMATODA Means round worms They are long slender and smooth. Some of them are parasitic and can be deadly.

12. Characteristics of Each Groups of Invertebrate PLATYHELMINTHES Means flat worms Some of them are parasites .They have no digestive system because they feed on the digested food of their hosts.

13. Characteristics of Each Groups of Invertebrate PORIFERA Means pore – bearing invertebrates They have pores all over their bodies. They take in food and oxygen through their pores

14. Characteristics of Each Groups of Invertebrate CNIDARIA/COELENTERATA Means hallow bodied animals with stinging tentacles Their tentacles have sting cells with poison-filled thread called nematocysts NEMATOCYST- A capsule within specialized cells of certain coelenterates a threadlike tube that delivers a paralyzing sting when propelled into attackers and prey.

15. INVERTEBRATE ANIMALS 1. ARTHROPODA 3. MOLLUSCA 8. CNIDARIA/ COELENTERATES 7. PORIFERA 6. PLATYHELMINTHES 5. NEMATODA 2. ECHINODERMATA 4. ANNELIDA Means jointed legs Means spiny skinned animals Means soft bodied and shapeless animals Means segmented worms Means round worms Means flat worms Means pore – bearing invertebrates Means hallow bodied animals with stinging tentacles

16. Rearrange the following letters to form new words 1. They are covered with spines A T A M R E D O N I C H E 2. They are soft bodied and shapeless animals A C S U L L O M 3. They are segmented worms A D E N L I N A 4. These worms have long, slender, and smooth bodies. A D O T A N E M 5. These worms have flat bodies. S E T H N I M L E H P L A T Y E C H I N O D E R M A T A M O L L U S C A A N N E L I D A N E M A T O D A P L A T Y H E L M I N T H E S

17. Rearrange the following letters to form new words 6. They have pores all over their bodies 7. They are hallow bodied animals with sting tentacles. A T A R E T N E L E C O 8. The largest phylum and they have jointed legs. R A P E R I F O P O R I F E R A C O E L E N T E R A T A R O H O T A R P A D A R T H R O P O D A

18. 1. ARTHROPODA 3. MOLLUSCA 8. CNIDARIA/ COELENTERATES 7. PORIFERA 6. PLATYHELMINTES 5. NEMATODA 2. ECHINODERMATA 4. ANNELIDA Describe the following animals