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Invertebrates are categorized by the fact that ther are _____________, ________________
________________

multicellular, heterotrophic, eukaryotes

how do heterotrophs get their food?

they must consume others

A hollow ball of cells

blastula

The development of the layers of a blastula

gastrulation

The cell within the tissue layers is called a ?

gastrula

___ ______ helps with the development of a body form

Hox Gene

What is considered to be the common ancestor of animals?

protista

A lack of symmetry is considere _________

asymmetrical

based on 4 or 5, this symmmetry is based on an axis

radial symmetry

mirror image symmetry

bilateral symmetry

The top/back side of an animal is called

dorsal

the bottom/stomach side is called

ventral

which animals have a anterior and posterior end

bilaterally symmetrical

the head of an animal is called

anterior

The tail of an animal is called

posterior

the development of the head is called?

cephalization

An animal with 2 germ layers is called?

Diploblastic

Animals with all 3 germ layers are called?

triploblastic

A true body cavity is called a _________

coelom

To be a true coelom there needs to be a _______________________________

completely lined cavity

when the mesoderm is only partially lined

pseudocoelom

an animal without a coelom is called

acoelomate

In a _________ cleavage is spiral and determinant

protostome

In a ____________ cleavage is radial and indeterminant

deuterostome

THe splitting of initially solid masses of mesoderm to form the coelomic cavity is called _______ development

schizocoelous

in deuterostome development the formatio of the body cavity is described as __________

enterocoelous

What develops first in a protostome

mouth

What develops first in a deuterostome

anus

Invertebrates account for __%of species

95

The first category of invertebrates are ________

Porifera

An example of a porifera is a

sponge

Sponges cant move which means they are

sessile

collar cells are also called

chaonocytes

an example of a filter feeder is a

sponge

which invertebrate has no tissue, organs or systems?

sponges

how do sponges get their food>

suspension feeders

what is the purpose of choanocytes?

generates a water current

2nd group of invertebrates

cnidaria

An example of cnidaria is

jellyfish

cnidarians have ____________ symmetry

radial

how many layers of cells do cnidarians have?

2

what are the two forms of cnidarians

polyp and medusa

unique cells in cnidarians that function in defense

cnidocytes

Hydrozoa, scypnozoa, cubozoa and anthozoa are examples of ?

Cnidarians

Platyhelminthes are also known as

flatworms

where do flatworms live?

aquatic environments

tapewoms, flukes and planaria are examples of

flatworms

which invertebartes have only one opening?

flatworms

can planarians regenerate?

yes

Turbelleria, monogenea, tremotoda, and cestoda are examples of?

flatworms

what is an examle of a parasitic flatworm?

tapeworm

Rotifers reproduce by

parthenogenesis

probiscis are also known as

nemerteans

which category of invertebrates have a muscular foot, visceral mass and a mantle

molluscs

examples of gastropods include:

slugs, snails, and conches

examples of bivalves include

clams, oysters and scallops

examples of cephlapods include:

octopus and squid

the 1st animals with a simple brain are

molluscs

what kind of circulatory system do mollusks have

open

the name of mollusk's larvae is

trachopore

about 3/4 of all mollusks are

gastropods

In a process called ___________ the animals anus and mantle end up above the head

torsion

segmented worms are called

annelids

oligochaeta,polychaeta and hirundinea are examples of?

annelids

bristles made of chitin are called

septae

examples of annelids are

leeches and earthworms

nonsegmented pseudocoelomates are called

nematodes

whats found in soil and eggs enther children's mouth

ascaris

the most common roundworm is the _____

pinworm

what is found in uncooked pork

trichinella

common in warm climates, found in contaminated soil and enters body through feet when people walk barefoot

hookworm

Segmented coelomates that have an exoskeleton and jointed apppndages

arthropods

_ out of _ species is an arthropod

2; 3

early arthropods were called

trilobites

1st animals with jointed appendages

arthropods

all arthropods have an _______________

exoskeleton

the 3 fused body parts are called

head, thorax,abdomen

specialized jaws are called

mandibles

uses ___________ _____ for excretion of waste

malpighian tubes

metamorphosis includes _ stages

4

incomplete metamorphosis includes _ stages

3

metamorphosis is

egg, larvae,pupa, adult

incomplete metamorphosis is

egg, nymph, adult

blood fluid in arthropods is called

hemolymph

spiders, ticks, mites, scorpions, and horshoe crabs are examples of what subphylum?

cheliceriforms

millipedes and centipedes belong to what subphylum?

myripoda

insects belong to what subphylum?

hexapoda

barnacles are in what subphylum?

crustaceans

Echinoderms are _______ and ___________

chordates and deuterostome

examples of echinoderms are

sea stars, sea cucumbers and sea urchins

a network of hydraulic canals branching inot tube feet that function in locomotion feed and gas exchange is what?

water vascular system

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