1. Complex Invertebrates
Arthropods and Echinoderms

2. 15-3 Arthropods Arthropods More than a million have been identified
Main competition for food
Insects, Crustaceans, spiders, and scorpions

3. 15-3 Arthropods 3 Main Characteristics Exoskeleton Rigid covering
Does not grow
Must be shed (molting)

4. 15-3 Arthropods 3 Main Characteristics Segmented body
Jointed appendages

5. 15-3 Arthropods Open Circulatory system Reproduce sexually
Blood is not contained in tubes
From heart through open spaces in body
Blood carried food but not oxygen
Reproduce sexually
Stay males and females

6. 15-3 Arthropods
Crustaceans
Crabs
Lobsters
Barnacles
Shrimp

7. 15-3 Arthropods Crustaceans Body divided into segments
A pair of appendages is attached to each segment
Claws, legs, or antennae
Can regenerate certain body parts

8. 15-3 Arthropods Crustaceans Most live in watery environments
Breath through gills

9. 15-3 Arthropods Centipedes
Have one pair of legs in each segment of their body
Have claws that inject venom
Carnivores
Live in moist environments

10. 15-3 Arthropods Millipedes
Have 2 pairs of legs for each segment of their body
Herbivores
Roll up in ball when in danger
Live under logs and rocks

11. 15-3 Arthropods Arachnids Body divided into 2 parts 4 pairs of legs
Head and abdomen
4 pairs of legs
Are attached to their head

12. 15-3 Arthropods Spiders Feed on insects or small vertebrates Webs
Made of silk
Secreted by structures in abdomen
Most are remade every day

13. 15-3 Arthropods
Funnel Web

14. 15-3 Arthropods
Trapdoor Web

15. 15-3 Arthropods Spiders Injects venom in prey through fangs
Either kills or paralyzes prey
Preserves living creatures

16. 15-3 Arthropods Spiders Have book lungs Has several sheets of tissue
As oxygen passes over sheets it is removed

17. 15-3 Arthropods Scorpions Have large stingers Hold prey with claws
Live under rocks and logs
Nocturnal

18. 15-3 Arthropods Ticks and Mites Live on other organisms
Live off body fluids
Juices of plants
Blood of animals

19. 15-3 Arthropods Insect Structure 3 Parts
Head
Chest (Thorax)
Abdomen
Has 3 pairs of legs attached to the chest

20. 15-3 Arthropods Insect Structure Many eyes Compound eyes Simple eyes
Contain many lenses
Detect movement
Simple eyes
Detect light and dark

21. 15-3 Arthropods Insect Structure Most have wings
Can have many pairs
Has series of tubes for carrying oxygen
Reproduce sexually

22. 15-3 Arthropods Growth and Development Grow rapidly Metamorphosis
Must shed exoskeleton
Metamorphosis
When an insect changes their appearance during development

23. 15-3 Arthropods Metamorphosis Complete 4 stage process Egg Larva
Spends most of the time eating
Pupa
Usually covered in cocoon or chrysalis
Adult

24. 15-3 Arthropods Metamorphosis Incomplete Egg Young Adult Nymphs
Looks like adult but doesn’t have all characteristics
Adult

25. 15-3 Arthropods Insect Behavior Most live solitary lives
Do not directly compete for available food
Males must attract females
Buzzing
Colors/lights
Pheromones
Chemicals that attract opposite sex

26. 5-3 Arthropods Insect Behavior Social insects
Can not survive on their own
Form colonies or hives
Individuals perform specific jobs

27. 15-3 Arthropods Defense Mechanisms Mimics Weapons
Look like surroundings
Look like a predator
Weapons
Stingers
Bite
Venom

28. 15-3 Arthropods
Syrphid Fly

29. 15-3 Arthropods
Walking Stick

30. 15-3 Arthropods
Viceroy Butterfly

31. 15-3 Arthropods
Owl Butterfly

32. 11-3 Echinoderms: The “Spiny-Skinned” Animals
Internal skeleton
Bone like plates
Made of calcium
5 part body

33. 11-3 Echinoderms: The “Spiny-Skinned” Animals
Water vascular system
Fluid-filled internal tubes that…
carry food and oxygen
Remove waste
Help with movement

34. 11-3 Echinoderms: The “Spiny-Skinned” Animals
Tube feet
Suction-cuplike
Use to walk
Use to open shells and catch food

35. 11-3 Echinoderms: The “Spiny-Skinned” Animals
Starfish
Have 5 or more arms extending from a central body
Have hundreds of tube feet
Used to open clams
Regenerate

36. 11-3 Echinoderms: The “Spiny-Skinned” Animals
Sea Lilies

37. 11-3 Echinoderms: The “Spiny-Skinned” Animals
Feather Star

38. 11-3 Echinoderms: The “Spiny-Skinned” Animals
Sea Cucumber

39. 11-3 Echinoderms: The “Spiny-Skinned” Animals
Sea Urchins

40. 11-3 Echinoderms: The “Spiny-Skinned” Animals
Sand Dollar

41. 11-3 Echinoderms: The “Spiny-Skinned” Animals