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Invertebrates 1. Invertebrates have no ______________

Invertebrates 1. Invertebrates have no ______________ 2. They make up ______% of the animal kingdom. 3. There are ______ groups 3. They are _________cellular. 4. Their nutrition is __________. 5. Their reproduction is _________. What will talk about in the next weeks?

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Invertebrates 1. Invertebrates have no ______________

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  1. Invertebrates 1. Invertebrates have no ______________ 2. They make up ______% of the animal kingdom. 3. There are ______ groups 3. They are _________cellular. 4. Their nutrition is __________. 5. Their reproduction is _________. What will talk about in the next weeks? 1. What are the different groups of invertebrates? 2. What are the characteristics of these groups • nutrition • reproduction • habitat • scientific name 3. Evaluation: At the end we will have an exam

  2. Group 1 Sponge Scientific name: Porifera A Sponge never moves. It stays in the same place all its life. It reproduces sexually. The male and female release the sperm and ova into the water to make a new sponge. It lives in salt-water, in the seas and oceans all around the world. How does it feed? Look at the diagram. Water moves through the holes. The sponge takes the nutrients and then the water leaves the sponge. http://www.youtube.com/watch?v=T7E1rq7zHLc

  3. Group 2: Coral, hydras and jellyfish Scientific name: Cnidaria One hole-mouth and anus Tentacles Jellyfish What do they all have in common? 1. They all cansting, and the jellyfish is sometimes toxic to humans 2. They hunt their food. They catch it in their tentacles and then eat it. 3. The have one hole that serves as a mouth and anus! What are the differences? Hydra and coral do not move, jellyfish can move. Hydra have asexual reproduction-budding Jellyfish and coral use sexual reproduction Jellyfish and Coral live in warm seas, hydras live in ponds

  4. Segments Head Group 3 Worms-divided into three Group 3a Segmented worms Scientific name : Annelid Tail These worms' bodies are formed of ring like segments-earthworm They are hermaphrodites-they can be both male and female They have a head and a tail, and their body is moist to help movement They eat decaying plants and animals. They live in the ground Why are they important?

  5. This is a tape worm. It was living in a cow's intestine Group 3b Round worms Scientific name: Nematoda These worms cannot move very well They taper to the end They reproduce sexually All in the pictures are parasites, they live in other plants or animals, including humans Parasite A worm living in someones eye

  6. Group 3c Flat worm Scientific name: Plathhelminthes These are the most primitive of the worms They reproducesexually Most have a mouth but no anus! Most of this group areparasites. These worms live in the sea This is a liver fluke. They are very dangerous to farm animals

  7. Group 4 Sea Urchin and Star Fish • Scientific name: Echinoderms Spines for protection These animals are fixed or they move very slowly. They have spines to protect themselves. They lived in salty water. They do not have a head, and the mouth is on the underside. They are carnivorous and eat small crustanceans or molluscs. The reproduce sexually, by eggs and some species are hermaphrodite. Mouth on underside Starfish eating Army of Sea Urchins - From one leg, a star fish can regenerate his whole body!

  8. Group 5 Molluscs Every mollusc has these similarities: • A head-it contains head and eyes and mouth • A body with all the main organs • A foot which helps them move about They can be carnivores or herbivores They reproduce sexually, with eggs. They are also hermaphrodite. Most have a shell of one or two valves Foot Shell Head and eyes

  9. There are threegroups. • Gastropods-slugs, snails and sea snails. Theyhave a shell, exceptthe ______ • Bivalves-clams, cockles, mussels. Theirshell has twovalves. • Cephalopods-squid, cuttlefish and octopi. Theyhavetentacles, but no_______ Shark vs. Octopus QuaggaMusselsFeeding giantslugeatsflower

  10. Group 6: Arthropods Scientific name: Arthropods What do they have in common? • Their segmented body is divided into three parts-head, thorax and abdomen. • They all have antennae on their head • They reproduce sexually by eggs. • They moult-this means their old skin falls off and they then grow a new one. • Each group has its own characteristics How many groups are there?

  11. Some videos on Arthropods • YouTube - A Huge Centipede Fighting A Snake • YouTube - BIG spider - tarantula on my hand

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