Download - 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)
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
CNIDARIANS (Examples)
jellyfish
CNIDARIANS (Examples)
coralsCorals form colonies and secrete hard skeleton
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.
- belong to Phylum Platyhelminthes
- Flat and ribbon-like organisms
- Found in freshwater, in wet places and marine waters.
FLATWORMS
FLATWORMS (Examples)
planaria
tapeworm
FLATWORMS (Examples)
Planaria is an example of a free-living flatworm. It lives in moist surfaces, under rocks in ponds, rivers and even aquariums.
FLATWORMS (Examples)
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