5/3 & 5/4 - 7th Grade Agenda Collect HW: Reading & Notetaking 207 – 208 Arthropod & Echinoderms Froguts Lab (Starfish) Textbook Reading 434 – 438 HW: Reading Notetaking 209 – 212

Reflection Prompt: Write 3 questions that you have about spiders

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

Comparing Arthropods

What are Crustaceans? two or three body sections five or more pairs of legs two pairs of antennae.

Crustaceans

What is Metamorphosis? Process in which an animal’s body undergoes dramatic changes during its life cycle This is a picture of a Crab Larva

What are Arachnids? Ticks, Mites, Scorpions & Spiders two body sections four pairs of legs

Which type of animal is most numerous in the world? Insects! 73% of all animal species are insects. Which type of animal is most numerous in the world?

What are the characteristics of insects? Invertebrates (Doesn’t have a backbone) Exoskeleton (Exo = outside, skeleton) Arthropod (Arthro = joined, Pod = Leg) 3 pairs of legs 1 pair of antennae Most insects have wings

What are Insect’s Three Body Sections? Head Thorax Abdomen

What is found on an insect’s Head? Head: Most of an insect’s sense organs, such as the eyes, mouth and antennae, are located on the head.

What is found on an insect’s Thorax? Thorax: An insect’s midsection is the section to which wings and legs are attached.

What is found on an insect’s Abdomen? Abdomen: Inside the abdomen are many of the insect’s internal and sexual organs. Small holes on the outside of the abdomen allow air, which contains oxygen, to enter the body.

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)

Grasshopper Poster p.413 Draw the grasshopper Label the Abdomen, Thorax, Head Describe what is found in the Abdomen, Thorax, Head