cicada
Uploaded by
24 SLIDES
418 VUES
250LIKES

Overview of Invertebrates: Characteristics and Classification of Non-vertebrate Animals

DESCRIPTION

This comprehensive guide explores the general characteristics of animals, focusing on invertebrates—organisms without a backbone. Key features include their heterotrophic nature, ability to move, multicellularity, and eukaryotic cells. The text explains various types of invertebrate body structures, such as coelomates, acoelomates, and pseudocoelomates, as well as different skeletal systems (hydrostatic, exoskeleton, endoskeleton). It also delves into feeding, digestion, circulation, respiration, excretion, and reproductive methods, while introducing major phyla like Porifera, Cnidaria, and Arthropoda.

1 / 24

Télécharger la présentation

Overview of Invertebrates: Characteristics and Classification of Non-vertebrate Animals

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Biology Notes: Unit 7 Exploring Invertebrates

  2. I. General Characteristics of Animals • A. Heterotrophic- Must take in food • B. Mobility- Most animals can perform rapid, complex movements • C. Multicellularity- Made of more than one cell • D. Eukaryotic- Made of true cells with nucleus and organelles

  3. II. Invertebrates • Animals without a backbone

  4. III. Invertebrate Characteristics • A. Internal Body Cavities • 1. coelom- body cavity • A. acoelomates- animals with no body cavity • B. pseudocoelomates- animals with a false body cavity • C. coelomates- animals with a true body cavity

  5. B. Skeletons • 1. hydrostatic- use water contained under pressure • 2. exoskeleton- a rigid external skeleton • 3. endoskeleton- an internal skeleton exoskeleton endoskeleton

  6. C. Body Symmetry • 1. asymmetrical- irregular in shape • 2. radial- body parts arranged around a central axis • Bilateral- right and left sides that are mirror images

  7. Body Symmetry

  8. D. Feeding and Digestion • 1. intracellular digestion- digestion within special body cells • 2. gastrovascular cavity- a digestive sac with a single opening • 3. extracellular digestion- food is digested by special organs

  9. E. Circulatory System • 1. open system- blood is not contained in vessels • 2. closed system- heart circulates blood inside blood vessels

  10. F. Methods of Respiration • 1. respire through the skin (earthworm) • 2. use gills (crayfish, clams) • 3. book lungs (spider) • 4. trachea (insects)

  11. Methods of Respiration gills Book lungs trachea

  12. F. Methods of Excretion • 1. flame cells (flatworms) • 2. nephridia (mollusks, earthworms) • 3. malpighiantubules (terrestrial arthropods)

  13. Methods of Excretion

  14. H. Response • 1. centralization- concentration of nerve cells at anterior end • 2. cephalization- anterior developed into a definite head

  15. I. Types of Reproduction • 1. asexual-clone of the parent • regeneration: can regrow lost body parts • Budding :separation of a parent into 2 or more individuals • 2. hermaphrodites- contains both male andfemaleorgans • 3. sexual- fusion of egg and sperm

  16. IV. Invertebrate Phyla A. Porifera- sponges

  17. B. Cnidarian- jellyfish, corals, sea anemone

  18. C. Platyhelminthes- flatworms-planaria, tapeworm

  19. D. Nematodes- roundworms

  20. E. Annelids- segmented worms-earthworms, leeches

  21. F. Mollusks- clams, snails, squid

  22. G. Echinoderms- starfish, sea urchin, sand dollar

  23. H. Arthropods- spider, grasshoppers

More Related