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Phylum
| Question | Answer |
|---|---|
| 5000 species | Porifera |
| Asymmetric bodies and lack distinct tissues, often classified from other animals | Porifera |
| Immobile except in early stages | Porifera |
| Collect food particles by sweeping flagellated cells | Porifera |
| Flagellated cells | Choanocytes |
| 10,000 species | Cnidaria |
| Also Called coelenterate | Cnidaria |
| Develop from two layered embryo and have two separate tissue layers and radial symmetry | Cnidaria |
| Diploblastic | two-layered |
| Two live stages, mobile usually medusa and the sessile polyp | Cnidaria |
| Nematocysts | Stinging cells |
| Hydras, Sea anemones, Corals, Jellyfish, portugese man o war | Cnidaria |
| 15, 000 species | Platyhelminthes and Nematoda |
| Flatworms are most primitive phylum to develop this | Triploblastic (3 layered embryo). |
| Bilateral body symmetry, and are acoelomate (lack body cavity) | Platyhelminthes |
| Space between digestive tract and body wall is filled with tissue | Platyhelminthes |
| Have true head and brain, but digestive system has one opening that functions as both mouth and anus | Platyhelmintheez |
| Most are flatworms and hermaphroditic | Platyhelminthees |
| Parasites like tapeworms, flukes, and free living organism like planarians | Platyhelmintheez |
| Roundworms | Nematoda |
| Unsugmented worms that live in many habitats | Nematoda |
| Pseudocoelomate | Nematoda |
| 3 tissue layers that are concentric, but the body cavity is not lined with tissue from the mesoderm | Nematoda |
| Mesoderm | middle embryonic layer |
| Like platyhelmintheez are parasitic and freeliving | Nematoda |
| Hookworms and things that cause elephantiasis, trichinosis, and river blindness | Nematoda |
| Soil ones are pests, but others kill plant pests | Nematoda |
| The nematode species that is common subject in genetics labs - Caenorhabdis elegans | |
| 11,500 species | Annelida |
| Segmented worms represent first lineage of truly eucoelomate animals | Annelida |
| Eucoelomate | having a body cavity lined with mesoderm tissue) |
| Body cavities are lined with tissue derived from embryonic mesoderm | Annelida |
| Polychareta and terrestrial Oligochaeta classes and leeches | Annelida |
| Earthworms | Annelida |
| Have kidney structure, blood vessels, and sometimes hermphroditism | Annelids |
| 800,000 species | Arthropoda |
| Most diverse and duccessful phylum on earth with about 75% of all species | Arthropoda |
| Characterized by joited legs and a chitinous exoskeleton | Arthropoda |
| Segmented but segments are usually fused into larger body parts with special function | Arthropoda |
| Insects, centipedes, millipedes | Uniramia |
| Arachnids, sea spiders, horseshoe crabs | Chelicerata |
| Shrimps, lobsters, crabs, crayfish, barnacles, pillbugs | Crustacea |
| Trilobites (now extinct) | Trilobitomorpha |
| Only 1 specie | Cycliophora |
| Symbion Pandora | cycliophora |
| Tiny invertebrate first identified in 1995 when Danish biologist foujnd species in mouth of Norweigan lobster | Symbion Pandora |
| Closely related to marine phyla Entoprocta and Ectoprocta | Cycliophora |
| 50,000 species | Mollusca |
| Second most diverse phylum | Mollusca |
| Soft body covered by a thin mantle, with a muscular foot and an internal visceral mass | mollusca |
| Two fluid filled body cavities derived from mesodermal tissue | Mollusca |
| Small coelom and large hemocoel that functions as open circulatory system | Mollusca |
| Shell composed of calcium carbonate and protein, secreted by mantle | Mollusca |
| Gastropoda (Slug, Snail), Bivalvia (clams, oysters, scallops), Cephalopoda (nautilus, squids, octopi) | Mollusca |
| 6,500 species | Echinodermata |
| Endoskeleton composed of many ossicles of calcium magnesium carbonate | - Echinodermata |
| Water Vascular system, ring canal around esophagus, locomotion by tube feet connected by WVS | Echinodermata |
| Five fold radial symmetry | Echinodermata |
| Sea stars, sea urchins, sea lilies, sea cucumber | Echinodermata |
| Hae varying degree of bilateral symmetry | Sea cucumbers |
| True head is absent, oral and aboral are used to describe body orientations | echinodermata |
| Particle feeding through WVS, everting stomach to engulf prey, and scraping device | Echinodermata |
| Scraping device on sea urchins | Aristotle’s lantern |
| 44, 000 species | Chordata |
| Home phylum to us | Chordata |
| Sea squirts | Urochordata |
| Lancelets | Cephalochordata |
| true vertebrates and most diverse subphylum. | Vertebrata |
| Pharyngeal gill slits, notochord, post-anal tail, dorsal hollow never cord | Chordata |
| often used as a demonstration organism in biology labs | Amphioxus |
Created by:
kiler10z
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