Animal kingdom(sponges, cnidarians, worms)

Animal Kingdom

by: Raymond S. Manalastas

SPONGES, CNIDARIANS, WORMS

• What you know about animal cells?

• How do animals differ in size, shape or habitat?

• How do they respond to their environment?

Review

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

Characteristics

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

1. Invertebrates – without backbones

2. Vertebrates – with backbones

2 Big Groups of Animals

1. Sponges2. Cnidarians3. Flatworms4. Roundworms5. Segmented worms6. Mollusks7. Echinoderms8. Arthropods

INVERTEBRATES

- Simplest animals- Live in shallow

and deep ocean- Young sponges are

motile, adults are attached to rocks

- belong to Phylum Porifera

SPONGES

- Body is supported by a “skeleton” called spicules.

- used for bathing and washing.

SPONGES

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

SPONGES

SPONGES (Examples)

- belong to Phylum Cnidaria

- Tentacles contain stinging ceslls called nematocysts.

CNIDARIANS

corals

jellyfish

hydra

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

CNIDARIANS

CNIDARIANS (Examples)

hydraHydra represents freshwater cnidarians


jellyfish


coralsCorals form colonies and secrete hard skeleton


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

- belong to Phylum Platyhelminthes

- Flat and ribbon-like organisms

- Found in freshwater, in wet places and marine waters.

FLATWORMS

FLATWORMS (Examples)

planaria

tapeworm


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


Tapeworms are also parasitic flatworms like flukes without a digestive system.

- belong to Phylum Nematoda

- Also known as nematodes

- Have long cylindrical and slender bodies

ROUNDWORMS

ascaris

- Decomposers in soil in both marine and freshwaters.

Other examples include heartworm, trichina worm, hookworm, pinworm

ROUNDWORMS

- belong to Phylum Annelida

- Also known as annelids- Characterized by a

segmented or repeated body parts.

Ex. Earthworms, polychaetes, leeches

SEGMENTED WORMS

- Annelids have nervous, circulatory, digestive and excretory systems.

- Gas exchange only occurs through diffusion.

SEGMENTED WORMS

earthworms

leeches

- Most polychaetes are marine living in tubes attached to rocks or sand.

- They get floating food through their feathery gills.

Example: sandworms

Polychaetes

- 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.

Leeches

Animal kingdom(sponges, cnidarians, worms)

Education

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