'True coelom' presentation slideshows

By: Bryan Gonzalez

Chapter 33 Invertebrates. By: Bryan Gonzalez. Key Concepts. 33.1- Sponges are sessile and have a porous body and choanocytes . 33.2- Cnidarians have radial symmetry, a gastrovascular cavity, and cnidocytes . 33.3- Most animals have bilateral symmetry

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Annelids

Annelids. The Segmented Worms. Characteristics. Includes duster worms, earthworms, & leeches Abundant in all habitats Have a true coelom fully lined with mesoderm Body divided into external segments called metameres (metamerism). Oligochaetes. Characteristics.

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The Animal Kingdom

The Animal Kingdom. Heterotrophic by ingestion Motile; behaviorally complex No cell walls Structure based on extracellular proteins, especially collagen. Characteristic cell junctions. Similarities in ribosomal RNA. Evolutionary Trends in Body Plan. Symmetry: None (sponges)

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Kingdom Animalia

Kingdom Animalia. Invertebrates 95% - 97% of all animals! Lack nerve cord protected by bony covering Vertebrates 3%-5% of all animals Have bony covering over nerve cord. Animal Complexity. What MAJOR characteristics of animals determine their complexity? What do you think?.

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Animals are heterotrophs that ingest their food Animals are multicellular eukaryotes

Animals are heterotrophs that ingest their food Animals are multicellular eukaryotes Their bodies are held together by structural proteins such as collagen Nervous tissue and muscle tissue are unique to animals

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Invertebrate Zoology

Invertebrate Zoology. Invertebrate Classification and Relationships. The Meek Will Inherit the Earth. Many diseases that effect humans and the animals we depend on are caused by invertebrates Invertebrates are the base of most food webs Invertebrates are the base of many medical studies:

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Animals and Systems

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Mollusks

Mollusks. Mollusks. Coelom : Fluid filled body cavity A circulation system helps carry nutrients and oxygen to the tissues and removes wastes and carbon dioxide. Blood moves by one ore more muscular hearts Mollusks : Have no segmented bodies Have 3 distinct regions

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Comparing Invertebrates

Comparing Invertebrates. The First Multicellular Animals. Fossils evidence from Ediacara Hills, Australia show some of the earliest and most primitive animals (575-543 mya). Altough these animals were bilateral and segmented, they were probably simple and with little internal specialization.

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Mollusks

Mollusks. Emily Yau and Bridget Waas. Germ Layers. Mollusks are tripoblastic : they have three germ layers Endoderm, ectoderm, and mesoderm. Symmetry. Most of mollusks are bilaterally symmetrical. Coelom. Mollusks are coelomates, and have a true coelom

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Molluscs

Molluscs. Characteristic Snails, scallops, slugs, octopus, and squids Soft body, protected by a shell. Molluscs. Three common characteristics Mantle - soft outer tissue, produces shell Muscular foot - used for locomotion or attachment. Mollusc. Visceral mass - internal organs

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ZOOLOGY 13

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Platyhelminthes

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Phylum- Annelida

Phylum- Annelida. http://kentsimmons.uwinnipeg.ca/16cm05/16labman05/lb6pg2_files/earthworm2.bmp. Phylum Annelida. This phylum consists of the segmented worms The members of this phylum live in three different environments: Freshwater Saltwater On land

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PERITONEUM and COELOM

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Kingdom Animalia

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