Parazoa=
sponges
Eumetazoa
all animals except sponges
animals unicellular or multicellular?
multicellular
Animals are heterotrophic or autotrophic
heterotrophic
Animals have an ___ in which they ingest food
opening
Symettry in the following animals:
Sponge
Humans
Asymettry-no apparent
Bilateral
Distinctive tissue layers in Hydra
2, everything else 3
Endoderm
innermost tissue layer, around digestive tract
mesoderm
middle, most numerous, muscle tissues
ectoderm
outermost, body covering, skin
body cavity present?
3 tissue layers=body cavity, <3 = no cavity
acoelomate
flatworm, no true cavity, mesoderm fills where cavity would be
pseudocoelomate
nematode, cavity between mesoderm and endoderm, length of animal
degrees of segmentation
linear repitition, ribs, vertebrae
cephalization
sensory equip concentrated toward front or head as in humans
Phylum Porifera
sponges, cessile as adult, move as larvae
Sponge/Spicule
support structures, prevent entry of animals
sponge/osculum
large opening
Sponge/collar cells
capture nutrients
Phylum Cnidaria
Corals, Jellyfish, Hydra. Tissue Grade, no specialized organs. Radial Symmetry.
cnidocyte
stinging tentacle
hydras/gastrovascular cavity
begins digestion
Only free living , non parasitic organisms
planarians
Phylum Platyhelminthes
Planarians, flukes, tapeworms
planarian/auricle
projects from each side of head
Dorsal is the ____ side and Ventral is the ____ side
back, belly
What organs are present for excretion of nitrogenous waste in a nematode (roundworm)?
lateral excretory canals
What organs are present for excretion of nitrogenous waste in a earthworm?
nephridia
What organs are present for excretion of nitrogenous waste in a cordate?
kidneys
Phylum Nematoda
Roundworms, males have a hook
Phylum Annelida
Earthworms, tubeworms, leeches
Phylum Mollusca
clams, oysters, snails, squid, octipi, slugs, chitons
What type of body cavity does a planaria (flatworm have)?
no true cavity (acoelomate)
What type of body cavity does a Ascaris (roundworm) have?
pseudocoelomate
What type of body cavity does a lumbricus (earthworm) have?
encoelomate
True or False. Clams have an open circulatory system
True