1. Animals – Part 2

2. Mollusca Bilateral symmetry Unsegmented, usually have a defined head
Main parts include: a muscular foot, a head, and a visceral mass (contains organs)
Live in oceans, freshwater, and on land

3. Snails

4. Mollusca http://www.medslugs.de/E/Med/Phyllidia_flava_10.htm

5. Clams

6. Mollusca

7. Cone Snail 400 to 500 species of cone snaill mollusks
harmful to humans - deadly nerve poisons
Hunt prey with a muscular, retractable proboscis that has a mouth, a salivary gland, and teeth.

8. Chambered Nautilus The Chambered Nautilus is a “living
fossil” – a member
Of the cephalopods
which includes
octopus and squid.
Close relatives date
back 100’s of
millions of years.
It propels itself
close to the sea
floor by shooting
water from its
movable siphon.

9. Squid & Octopus
Phylum Mollusca

10. Arthropoda Phylum includes 2/3 of all named species
Exoskeletons made of chitin—shed as the animal grows
Segmented – head, thorax, abdomen
Mouth and anus for digestion
Developed special appendages
Antennae for sensing environment
Legs for walking or jumping, defense
Wings for flying
Mouthparts for chewing, piercing, sucking

11. 5 Main Classes of Arthropods
Chilopoda
Insecta
Arachnida
Crustacea
Diplopoda

12. Arthropoda - Insecta Stink bug hawkmoth King cricket butterfly fly
dragonfly

13. Spiders

14. Scorpions The male and female scorpion sort of dance
around each other.
The male drops the
sperm packet; the female places it in her genital opening. After mating, the male may be eaten by the female. The female stores the sperm
until an optimal time
for fertilization. There
are no eggs; the little
scorpions develop and
then move to the
mother’s back for about a week.

15. Crustaceans Barnacles Lobster Crabs Water fleas - Daphnia
Horseshoe Crabs
Candy Stripe Shrimp
The Phylum Of
Arthropods
Crabs
Water fleas - Daphnia

16. Echinodermata Echinoderm means ‘spiny skin’ in Greek
Endoskeleton – skeleton inside of skin
Able to regenerate
Radial symmetry
Thousands of feet for moving across the seafloor

17. Sea Urchins and Starfish
Green Sea Urchins – Galapagos

18. Underside of Starfish
Note tube feet
Larva of
starfish

19. Sand dollars, sea biscuits & sea cucumbers
Live ↓
The adult body is long and soft, with a muscular wall. The retractile tentacles around the mouth represent modified tube feet. Spines and rays are all lacking.
Echinoderms

20. What is a vertebrate?
Spinal cord - Vertebrates have a spinal column (vertebrae) to protect this
Internal skeleton
Many have jaws, paired appendages, lungs, 4 limbs
Includes jawless fish, carilaginous fish, bony fish, amphibians, reptiles, birds, and mammals
Phylum
Chordata

21. Jawless fish
Have no jaw, lack vertebrae, skeletons of fiber & cartilage
Hagfish
Lamprey – “vampire of the sea”

22. Cartilaginous fish Lack true bone, skeleton built of cartilage
Paired fins, scales, gills
Includes sharks, skates, and rays
Grey nurse shark
Hammerhead shark

23. Bony Fish Live in fresh water and salt water
Skeletons are made of true bone
Live in fresh water and salt water

24. Amphibians
Amphibian means “double life” because they live in water as larvae and on land as adults
Larvae breathe through skin and gills
Most adult species breathe with lungs, lack scales and claws, have moist skin that has mucous glands
Reproduce through laying eggs without shells

25. Amphibians
Cane Toad
Poison dart frog
Newts
Salamanders

26. Birds and Reptiles Reptiles have dry, scaly skin.
Birds have feathers and wings.

27. Reptiles

28. Birds

29. Mammals 4 chambered hearts, lungs, kidneys Internal fertilization
Hair and mammary glands
Flexible backbone