The document discusses several invertebrate animal phyla, including sponges, cnidarians, flatworms, roundworms, and segmented worms. Sponges are the simplest animals and have a skeleton made of spicules to support their body. Cnidarians like hydra, jellyfish, and corals have stinging cells called nematocysts that they use for defense and capturing prey. Flatworms are flat ribbon-like organisms including parasitic tapeworms and free-living planaria. Roundworms have long cylindrical bodies and include parasites like the trichina worm as well as soil decomposers. Segmented worms have a segmented body and include earthworms, leeches, and

1. Animal Kingdom
SPONGES, CNIDARIANS, WORMS

2. Review
• What you know about animal
cells?
• How do animals differ in size,
shape or habitat?
• How do they respond to their
environment?

3. Characteristics
• Multicellular
• Eukaryotic
• Have no cell walls
• Have cells that transmit
messages.

4. Q42. In you observation,
how
are
animals
distinguished from the
other groups as to their
reaction to stimuli?

5. 2 Big Groups of Animals
1. Invertebrates – without
backbones
2. Vertebrates – with
backbones

6. INVERTEBRATES
1.
2.
3.
4.
5.
6.
7.
8.
Sponges
Cnidarians
Flatworms
Roundworms
Segmented worms
Mollusks
Echinoderms
Arthropods

7. SPONGES
-
-
Simplest animals
Live in shallow and
deep ocean
Young sponges are
motile, adults are
attached to rocks
belong to Phylum
Porifera

8. SPONGES
- Body is supported by a
“skeleton” called
spicules.
- used for bathing and
washing.

9. SPONGES
- Waste water and
materials go out of
the sponges through
the osculum.

10. SPONGES (Examples)

11. SPONGES (Examples)

12. CNIDARIANS
-
belong to Phylum
Cnidaria
Tentacles contain
stinging ceslls
called
nematocysts.
hydra
jellyfish
corals

13. CNIDARIANS
- These poison-filled
structures are used
for defense and to
capture their prey.

14. CNIDARIANS (Examples)
hydra
Hydra represents freshwater cnidarians

15. CNIDARIANS (Examples)
jellyfish

16. CNIDARIANS (Examples)
corals
Corals form colonies and secrete
hard skeleton

17. CNIDARIANS (Examples)
Corals form colonies and
secrete hard skeleton. These
accumulate to form coral reefs.
Coral reef is where fishes and
other marine organisms breed.

18. FLATWORMS
-
-
belong
to
Phylum
Platyhelminthes
Flat
and
ribbon-like
organisms
Found in freshwater, in wet
places and marine waters.

19. FLATWORMS (Examples)
tapeworm
planaria

20. FLATWORMS (Examples)
Planaria is an example of a free-living
flatworm. It lives in moist surfaces,
under rocks in ponds, rivers and even
aquariums.

21. FLATWORMS (Examples)
Tapeworms are also parasitic
flatworms like flukes without a
digestive system.

22. ROUNDWORMS
-
belong to Phylum
Nematoda
Also known as
nematodes
Have long cylindrical
and slender bodies
ascaris

23. ROUNDWORMS
-
Decomposers in soil in both
marine and freshwaters.
Other examples include heartworm,
trichina worm, hookworm,
pinworm

24. SEGMENTED WORMS
-
belong to Phylum Annelida
Also known as annelids
Characterized by a segmented
or repeated body parts.
Ex. Earthworms, polychaetes,
leeches

25. SEGMENTED WORMS
- Annelids have nervous,
circulatory, digestive and
excretory systems.
- Gas exchange only occurs
through diffusion.

26. earthworms
leeches

27. Polychaetes
-
Most polychaetes are marine
living in tubes attached to
rocks or sand.
- They get floating food through
their feathery gills.
Example: sandworms

28. Leeches
-
-
Are blood-sucking annelids.
They have suckers that are
also attach themselves to
their hosts.
They secrete an ati-clotting
chemical that has been used
in medicine.