'Spiral cleavage' diaporamas de présentation

Animals: The Invertebrates

Animals: The Invertebrates. Chapter 23. Characteristics of Animals. Multicelled heterotrophic eukaryotes that ingest or parasitize other organisms. Require oxygen for aerobic respiration Reproduce sexually, and perhaps asexually Motile at some stage Develop from embryos

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Biology 1102

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The Animal Kingdom

The Animal Kingdom. Characteristics of Animals. Eukaryotic Multicellular Reproduce Specialized Cells Heterotrophic (must obtain food) Must Digest Food Most animals move and have a fixed size in the adult form. B. C. A. ANIMAL PHYLA. 3. 4. 1. 2. 11. 9. 10. 7. 8. 5. 6.

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Introduction To Animal Evolution

Introduction To Animal Evolution. Chapter 32. Animals 1 st appeared in Precambrian in waters, spread to land. 5 criteria that define animal: 1 Animals multicellular, must get food through ingesting other organisms or organic material.

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Animal Body Plans Chapter 3, Zoology

Animal Body Plans Chapter 3, Zoology. What is an Animal?. An animal is a living organism that is multicellular , eukaryotic , heterotrophic , and lacks cell walls . Multicellular means an animal is made up of many cells or (more than one cell).

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E m b r yo l o g y

E m b r yo l o g y. Embryology: - study of the development of an embryo. Fertilization: male and female gametes fuse to form a zygote. Fertilization usually occurs in the funnel shaped end of a Fallopian Tube A sperm must penetrate the egg ZYGOTE

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Other facets of invertebrate embryology

Other facets of invertebrate embryology. Stages of development. Egg and sperm Fertilized embryo Cell division resulting in a multicellular embryo (cleavage) Radial cleavage Spiral cleavage Morula--solid ball of cells Blastula-hollow ball of cells Gastrula. The outcomes of gastrulation.

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