Animalia Invertebrate By: Mia Richmond, Dana Kai Reilly-Gober, Brooke Lerback & Helen Remke

Animalia Invertebrate or “Animal without a backbone”

Organization and Obtaining of Energy Animalia Invertebrates: - Are Eukaryotic - Are Multicellular organisms - Don’t have cell walls Invertebrates can’t make their own food. They are heterotrophic which are organisms that feed off other things to get their energy. Being heterotrophic is one of the main characteristics of being an animal. We eat things, whether it is plants or other animals. That’s just the way the world works.

Classification Invertebrates are animals that lack a backbone Most invertebrates are organized in a way call symmetrical organization which means when you can draw a line down the middle of the organism and the two sides look like mirror images and some example are - a-symmetry: lack of equality or equivalence between parts or aspects of something; lack of symmetry bi-symmetry: showing bilateral symmetry lateral symmetry: characteristic of animals that are capable of moving freely through their environments

Phylums of Invertebrates There are nine phyla of Invertebrates: Porifera, Cnidaria, Platyhelminthes, Nematoda, Rotifera, Mollusca, Annelida, Arthropoda, and Echinodermata For example- Cnidaria: includes sea anemones, jellyfish, coral, and hydra. Porifera: sponges Platyhelminthes: flatworms Nematoda: roundworms Rotifera: rotifers Annelida: segmented worms Mollusca: snail, octopus, clam Echinodermata: starfish, sea cucumber, and sea lilies Arthropoda: trilobita, horseshoe crabs, mites, millipedes, insects

Reproduction Most reproduce sexually; however some also reproduce asexually. Sexually reproducing means that two gametes from separate organisms (male and female) combine to form a new organism. Asexually reproducing means reproduction, as budding, fission, or spore formation, not involving the union of gametes. Fission- the division of one cell, body or body part into two. Budding- certain cells divide rapidly and develop on the body surface to form an external bud. Fragmentation- a body part is lost and then regenerates into new organisms.