Kingdom Porifera-Kingdom Annelida

Learning outcomes

(a) Describe the unique characteristics of Kingdom Animalia
(b) State the classification of Animalia into nine phyla: Porifera,
Coelentrata/Cnidaria, Platyhelminthes, Nematoda, Annelida,
Arthropoda, Mollusca, Echinodermata and Chordata.
(c) Discover the unique characteristics of the following phyla:

i. Porifera (e.g: Leucosolenia sp.)
ii.Cnidaria (e.g: Obelia sp.)
iii.Platyhelminthes (e.g: Taenia sp.)
iv.Nematoda (e.g: Ascaris sp.)
v.Annelida (e.g : Pheretima sp.)

Store excess Reproduce
carbohydrate in sexually
(most)
the form of
glycogen Dominant
stage in the
Heterotrophic life cycle is
(Holozoic)
diploid

Multicellular Unique Have
Eukaryotic Characteristics differentiate
Organism
of d tissue -
Kingdom response to
Animalia
stimuli &
locomotion

The classification Invertebrate Porifera
of Animalia into Vertebrate Cnidaria

nine phyla: Platyhelminthes
Nematoda
Annelida
Mollusca
Arthropoda

Echinodermata
Cordata

b) The classification of Animalia

into nine phyla:

KINGDOM ANIMALIA

PHYLUM EXAMPLE

Invertebrates

i. Porifera Leucosolenia sp.

ii Cindaria Obelia sp.

iii Platyhelminthes Taenia sp.

iv Nematoda Ascaris sp.

v Annelida Pheretima sp.

vi Arthropoda Valanga sp.

vii Mollusca Achatina sp.

viii Echinodermata Asterias sp.

ix Chordata Vertebrates
Amphioxus sp.



Aquatic
mainly marine

No true tissues

Asymmetrical
No body cavity

Most are Reproduce
sessile asexually &

sexually Leucosolenia sp.
(hermaphrodite)

Filter Body has an
feeder endoskeleton made up

Water of spicules
out
Amoebocyte → pick up
through food vacuole from
osculum
choanocyte, digest &
Water in distribute to other cells
through
ostium Mesohyl → gaseouse
exchange & waste
removal

Choanocyte → regulate
water intake & trap food

Water exits through
osculum

Water move in
through ostium

PHYLUM CNIDARIA

(Obelia sp.)

Radial diploblastic
symmetry

Mainly lives dimorphism Tentacle for has cnidocyte
marine & locomotion & feeding → defense
freshwater
→ capture prey



Tentacle has cnidocytes

Inject poison



The life cycle of Obelia sp.

PHYLUM PLATYHELMINTHES

(Taenia sp.)

Bilaterally symmetrical Unsegmented

Divide laterally into two 1 body not segmented

Triploblastic
Acoelomate

Shows cephalization Parasitic
head
Development
of head region

proglottids In
intestine

In eye



Excretory system 2 lateral canals
→ Protonephridia
with branches
bearing

flame cells

PHYLUM NEMATODA

(Ascaris sp.)

Have nervous Complete alimentary canal
system (have mouth and anus)

Have excretory Hydrostatic
system: exoskeleton

metanephridia

Body covered with
smooth cuticle

Pseudocoelom

Bilateral Triploblastic
symmetry
Unsegmented

Some are parasitic No circulatory and
respiratory system

Reproduction: Bisexual

PHYLUM ANNELIDA

(Pheretima sp.)

to store the eggs of the worm Body cavity completely lined
with medoderm

Coelomate

Bilateral Septum: membrane Triploblastic
symmetry between segment

Complete digestive sytem
( have anus and mouth)

Bilateral Division of body
symmetry into a number of
segments each
contains same
organ

Posses complex excretory
system (have nephridia in all
segment except first three )

Closed blood Have nervous system and
circulatory system sensory system

Chitinous setae

Hermaphrodite : have both male
and female genital pore