动物的分类英文介绍

EXAMPLES: SHRIMP, LOBSTER, CRAB, BARNACLE
7. MOLLUSCA
• There are 3 classes: gastropods, bi-valves, cephalopods • Have an external shell • Have bi- lateral symmetry • Cephalopods are extremely intelligent • ex.- squid, octopus, cuttlefish, nautilus
Байду номын сангаас
6. ARTHROPODA
• • • • Animals with jointed appendages Have an exoskeleton They shed their exoskeleton (molt) We study crustaceans – these are marine arthropods
Polyps: Sea anemones
Purple striped jelly, Pelagia panopyra
3. PLATYHELMINTHES:
• One opening for ingestion and egestion • Primitive nervous system • Exchange gases by diffusion thru moist membranes • Bilateral symmetry
8. ECHINODERMATA
• • • • • Have spiny bodies Radial symmetry Benthic- bottom dwellers Central mouth on ventral surface ex.- sea urchin, sea star, sea cucumber, sand dollar
Animal Classification
THE ANIMAL KINGDOM
BASIC CHARACTERISTICS OF ANIMALS: 1. MULTICELLULAR ORGANISMS 2. CAPABILITY OF LOCOMOTION 3. MUST INJEST FOOD NINE ANIMAL PHYLA
INVERTEBRATES:
(8 PHYLA)
ALL LACK INTERNAL SKELETON, SOME HAVE EXOSKELTON OR SHELL
VERTEBRATES (CORDATES): (1 phylum)
INTERNAL SKELTON MADE OF BONE/ CARTILAGE
9. CHORDATA
• Have a backbone that protects the spinal cord • Most developed nervous system • Contains animals that we are most familiar with • ex.- fish, mammals, reptiles, amphibians
1. PORIFERA:
• • • • • • ‘Pore- Bearing” Filter feeders Asymmetrical Feed and get rid of wastes thru diffusion Sessile Ex.- sponges
2. CNIDARIA
• Have stinging tenacles • Stun prey with toxins • Prey is drawn into mouth and dissolved/ digested • Radial symmetry EXAMPLES: CORAL, JELLYFISH, SEA ANEMONE
EXAMPLES: PLANARIA, FLUKE, TAPEWORM
5. ANNELIDA
• Segmented worms • Each segment has a nervous. circulatory, excretory, muscular system • Bilateral symmetry • First organism with complex body systems EXAMPLES: LEECH, EARTHWORMS