5/9 - 7 th Grade Agenda Collect Reading & Notetaking 213 – 216 Arthropods & Echinoderms Video: Life In the undergrowth Textbook Reading 443 – 445 HW: Reading & Notetaking 217 – 218

Reflection Prompt: Describe 3 facts that you know about insects.

What are Arthropods? Insects Spiders Scorpions Lobster Crab Shrimp Centepedes Arthro = “Jointed ” Pod = “Foot”

Comparing Arthropods

Some arthropods have blue blood Horseshoe crabs have blue blood The have hemocyanin (which contains copper) instead of hemoglobin (which contains iron) in their blood They are more closely related to spiders and scorpions Has not changed much in 450 million years

What is the world’s largest spider? Goliath bird-eater Spider Eats mainly insect but will also eat lizards, bats and birds 12 inches long Lives in South America Female will eat the male after mating

How many eyes does a spider have? Most have 8 eyes Some spiders have 6, 4, 2, 0 eyes But most spiders have 8 eyes

How does spiders smell and hear? Spiders smell and hear with tiny hair on its legs

What is Complete Metamorphosis?

Caterpillar Anatomy

What is Gradual Metamorphosis?

How big is the world’s largest Insect Titan Beatle 7 inches long

An you spot an insect here? Dead Leaf mantis Sand Grasshopper

An you spot an insect here? Grasshopper Walking stick insect

What are some examples of Echinoderm? Star Fish Sea Urchin Sea Cucumber Sand Dollar

What are the characteristics of Echinoderms? Echino = “Spiny”, Derm = “Skin” Endoskeleton: Endo = inner, skeleton Five part radial symmetry Internal fluid system: Water vascular system

Echinoderm’s Body

Echinoderms are more closely related to humans than sponges Starfish Larva (Bilateral Symmetry) Mature Starfish (Radial Symmetry)

Starfish facts They can reproduce sexually and asexually A sea-star arm can only regenerate into a whole new organism if some of the central disk of the sea star is part of the chopped off arm. They don’t have a brain, heart or blood They get their oxygen through their tube feet They have a skeleton

Giant Millipedes African black millipede 15 inches long

Reflection Prompt: Write 5 facts from the video.