Biology Copyright Pearson Prentice Hall KINGDOM ANIMALIA KINGDOM ANIMALIA.
Kingdom Animalia
description
Transcript of Kingdom Animalia
Invertebrates: Critters with no backbone
-Porifera-Cnidaria-Worms: Flatworms, Roundworms, Annelida-Mollusks-Arthropods-Echinoderms
Answer: They are all animals!
Characteristics of Animals: • heterotrophic• eukaryotic• Multicellular• Show motility at some point• lack cell walls
95% = invertebrates (do not have backbone) ex. Insects to squid5% = vertebrates (have a backbone) ex. Mammals, reptiles, fish
Animal Functions1.Feeding:
Herbivore = eats plants
Carnivore = eats animals
Omnivore = eats plants and animals
Detritivore = feed on decaying organic material
Filter Feeders = aquatic animals that strain food from water
Parasite = lives in or on another organism (symbiotic relationship)
3. Circulation:-Very small animals rely on diffusion-Larger animals have a circulatory system to move materials throughout their bodies
4. Excretion:Primary waste product is ammonia
5. Response:Receptor cells = sound, light, external stimuliNerve cells => nervous system
6. Movement:* Most animals move
7. Reproduction: Most reproduce sexually = genetic diversity Many invertebrates can also reproduce asexually to increase their numbers rapidly
Body Symmetry- the body plan of an animal, how its parts are arranged
Asymmetry - no pattern (corals, sponges)
Radial Symmetry - shaped like a wheel (starfish, hydra, jellyfish)
Bilateral Symmetry - has a right and left side (humans, insects, cats, etc)
Cephalization - an anterior concentration of sense organs (to have a head)
*The more complex the animals becomes the more pronounced their cephalization
Anatomical Terms:anterior - toward the headposterior - toward the taildorsal - back sideventral - belly side
Segmentation- "advanced" animals have body segments, and specialization of tissue (even humans are segmented, look at the ribs and spine)
Body CavitiesCoelom – lies between the digestive tract and the body wall• Important because it provides
space in which internal organs can be suspended
• Provide room for internal organs (growth)
• Some cavities have fluids that are involved in circulation, feeding & excretion
• Acoelomates – no coelom ex. flatworm
• Pseudocoeloms – similar to coelom, but lack a mesoderm ex. roundworm