Animal Biology

STUDY
PLAY

Terms in this set (...)

mollusca
characteristics: feeding device like a toothed rasped tongue (called a radula), muscular foot to slide, dig, or jump, mantle of tissue covering the body, calcium carbonate shell, some propel themselves using a siphon as a water jet

ex: clams, snails, slugs, octopus, nautilus
annelida
many segments, active burrowing has affected climate, two digestive tract ends, fluid-filled compartments for locomotion

ex: earthworms leeches, polychaetes (all wormy)
porifera
stationary, spicules that act as a skeleton or support system, no symmetry or consistent shape, specialized cells, but no tissues or organs, water flows through the body which is full of holes and canals

ex: sponges
platyhelminthes
tubular mouth at mid-body, triploblast, but acoelomate, many members are parasitic, some of the simplest animals with bilateral symmetry which added segmentation

ex: flatworms
cnidarian
first animals with nerves & muscles, digestive tract with the same entrance and exit, some have stinging structures ( called nematocysts), some are free swimming medusae and some non-swimming polyps

ex: jellyfish, corals, anemone, and hydra
nematoda
body is basically a tube within a tube (pseudocoelomate), hollow body cavity for food

ex: vinegar eels, ascans, and pinworms
arthropoda
champions of a variation of appendages, exoskeleton called a cuticle, more species than any other phylum, first to venture into the air, pioneered leg joints

ex: crustaceans, spiders, millipedes, centipedes, and insects
echinodermata
5-part radial symmetry, tube feet for locomotion, all members live in the ocean, hard but flexible bodies with interlocking plates under the skin, some have little pincers

ex: sea stars, sea lilies, sea urchins, sea cucumbers, and brittle stars
chordata
most have internal skeletons, jaws, and skulls, all have notochords, and most have backbones

ex: vertebrates, lancelets, and tunicates
protostomes
the mouth forms first from the blastopore, spiral cleavage, schizoecoely, determinate growth
deuterostome
the anus forms first from the blastopore, radial cleavage, enterocoely, indeterminate growth
porifera
0 germ layers, no coelom, symmetry, or development pattern
cnidarian
2 germ layers (ecto and end), radially symmetric, no coelom or development
platyhelminthes
3 germ layers, biradial symmetry, acoelomate, no development
annelida
triploblast( 3 germ layers), bilateral symmetry, eucoelmate, protostome
arthropoda
triploblast, bilateral symmetry, eucoelmate, protostome
nematoda
triploblast, bilateral, psuedocoelomate, no development
mollusca
triploblast, bilateral, eucoelomate, protostome
echinodermata
triploblast, bilateral, eucoelomate, deuterostome
chordata
triploblast, bilateral, eucoelomate, deuterostome
ectoderm
forms the skin(epithelium), nerves, brain, sense organs
mesoderm
muscle, connective tissue, excretory organs, skeletal systems, circulatory system
endoderm
gut lining and associated organs
starfish gastrula
frog blastula
frog gastrula