Animal Phyla (Non-Chordates)

Which animal phylum contains sessile, suspension feeding sea sponges?

Porifera

What is the body symmetry in Porifera?

asymmetrical

What is the tissue organization in Porifera?

no true tissues (parazoa)

Do poriferans have a coelom?

no

What is the embryonic development in Porifera?

N/A

What is the respiratory system in Porifera?

none (diffusion)

What is the digestive system in Porifera?

intracellular digestion
(amoebocytes)

What is the nervous system in Porifera?

none

What is the excretory system in Porifera?

none (diffusion)

What is the circulatory system in Porifera?

none (diffusion)

What is the poriferan habitat?

aquatic

How do poriferans reproduce?

1. asexually (budding)
2. sexually (hermaphrodytic)

What are characteristic cells in Porifera pass food to amoebocytes?

choanocytes

What are the external openings in Porifera?

ostia

What are skeletal needles made of CaCO3 or SiO2?

spicules

What animal phylum contains hydra, jellyfish, sea anemones, and coral?

Cnidaria

What is the body symmetry in Cnidaria?

radial

What is tissue organization in Cnidaria?

diploblasts (Eumetazoa)

Do cnidarians have a coelom?

no

What is the embryonic development in Cnidaria?

N/A

What is the respiratory system in Cnidaria?

none (diffusion)

What is the digestive system in Cnidaria?

gastrovascular cavity

What is the nervous system in Cnidaria?

nerve net (no brain)

What is the excretory system in Cnidaria?

none (diffusion)

What is the circulatory system in Cnidaria?

none (diffusion)

What is the cnidarian habitat?

aquatic

What are the cnidarian stinging cells called?

cnidocytes

What are the cnidarian specialized cells containing a barbed or venomous coiled thread?

nematocysts

What are the 2 life cycles that a cnidarian can switch between?

polyp and medusa

How do cnidarians reproduce?

1. sexual
2. asexual

What acts as a hydrostatic skeleton to aid in movement for cnidarians?

gastrovascular cavity

Which animal phylum contains flatworms, Trematoda, flukes, tapeworms, and planarians?

Platyhelminthes

What is the body symmetry in Platyhelminthes?

bilateral with cephalization

What is the tissue organization in Platyhelminthes?

triploblast (Eumetazoa)

Do Platyhelminthes have a coelom?

acoelomate

What is the embryonic development of Platyhelminthes?

protostome

What is the respiratory system in Platyhelminthes?

none (diffusion)

hat is the digestive system in Platyhelminthes?

gastrovascular cavity

What is the nervous system in Platyhelminthes?

1. two symmetrical
nerve cords
2. brain

What is the excretory system in Platyhelminthes?

nephridia (protonephridia
with flame cells)

What is the circulatory system in Platyhelminthes?

none (diffusion)

How do Platyhelminthes reproduce?

1. sexually (hermaphroditic)
2. asexually (regeneration)

What is the habitat in Platyhelminthes?

mainly aquatic habitat

(Note: but can be found
in terrestrial habitat and
inside host)

What is the tapeworm digestive tract?

they don't have them
but instead, absorb
food around them

How do most organisms in Platyhelminthes obtain food?

parasitism

(Note: many are
either facultatively
or obligately anaerobic)

Which animal phylum contains roundworms, hookworms, trichina, C. elegans, and Ascaris?

Nematoda

What is the body symmetry of Nematoda?

bilateral with cephalization

What is the tissue organization of Nematoda?

triploblasts (Eumetazoa)

Do nematodes have a coelom?

pseudocoelomate

What is the embryonic development of Nematoda?

protostome

What is the respiratory system of Nematoda?

none (diffusion)

what is the digestive system of Nematoda?

alimentary canal

What is the nervous system of Nematoda?

anterior brain
(nerve ring) with
peripheral nerves

What is the excretory system of Nematoda?

none (diffusion)

What is the circulatory system of Nematoda?

none (diffusion)

What structure do some nematodes contain to prevent degradation by the host digestive system?

collagen cuticle

What kind of muscles do nematodes possess?

longitudinal muscles

(Note: no circular
muscles)

How do nematodes obtain food?

parasitic

What is the habitat for nematodes?

aquatic, terrestrial, and host

What kind of skeleton do nematodes possess?

hydrostatic skeleton

What are osmoregulatory organs unique to Nematoda?

Renette cells

Which animal phylum contains rotifers?

Rotifera

What is the body symmetry of Rotifera?

bilateral with
cephalization

What is the tissue organization of Rotifera?

triploblast (Eumetazoa)

Do rotifers have a coelom?

pseudocoelomate

What is the embryonic development in Rotifera?

protostome

What is the respiratory system in Rotifera?

none (diffusion)

What is the digestive system in Rotifera?

alimentary canal

What is the nervous system in Rotifera?

anterior brain with
peripheral nerves

What is the excretory system in Rotifera?

nephridia (protonephridia
with flame cells)

What is the circulatory system in Rotifera?

none (diffusion)

How do rotifers reproduce?

1. sexually
2. parthenogenetically

What is the habitat for Rotifera?

mostly freshwater environments

What structure do rotifers use to draw food and water into their mouths?

corona

(Note: corona
is ciliated)

Which animal phylum contains earthworms and leeches?

Annelida

What is the body symmetry in Annelida?

bilateral with
cephalization

What is the tissue organization in Annelida?

triploblast (Eumetazoa)

Do annelids have a coelom?

coelomate

What is the embryonic development in Annelida?

protostome

What is the respiratory system in Annelida?

none (diffusion)

What is the digestive system in Annelida?

alimentary canal

What is the nervous system in Annelida?

anterior brain with ventral nerve cord

What is the excretory system in Annelida?

nephridia

What is the circulatory system in Annelida?

closed circulatory
system, dorsal vessel,
"heart", multiple pairs
of aortic arches, and
distinct arteries and veins

What kind of worms are in Annelida?

segmented worms

How are the body segments marked in Annelida?

by annuli

What structures divides the coelom in Annelida?

septa

How do annelids reproduce?

1. sexually (hermaphroditic)
2. asexually (regeneration)

What kind of muscles do annelids possess?

longitudinal and circular muscles

What is the habitat in Annelida?

all 3 environments

What specialized structures are involved in locomotion and gas exchange in Annelida?

setae

Which animal phylum contains clams, snails, slugs, squid, octopi, cephalopods, and gastropods?

Molluska

What is the body symmetry in Molluska?

bilateral with
cephalization

What is the tissue organization in Molluska?

triploblast (Eumetazoa)

Do mollusks have a coelom?

coelomate

What is the embryonic development in Molluska?

protostome

What is the respiratory system in Molluska?

gills

What is the digestive system in Molluska?

alimentary canal

What is the nervous system in Molluska?

anterior brain with
ventral nerve cord

What is the excretory system in Molluska?

nephridia