Wake-up List and differentiate between the three groups of worms. Which group of worms developed a one way digestive system first? Which group of worms developed a specialized nervous system first?

Arthropoda

Basic Characteristics 1. Segmented body: Fewer than worms

Basic Characteristics 2. Jointed appendages; modified for movement, feeding, etc.

Basic Characteristics 3. Exoskeleton: external skeleton

Exoskeleton does not grow with the insect; needs to molt (shed their skin) when they grow (Video)

External Anatomy Antennae Head Thorax Abdomen Legs

Diversity of Body Shapes

Feeding/Digestion One way digestion; two openings

Herbivore Consume Producers

Consume consumers (meat) Carnivore Consume consumers (meat)

Consume Producers and Consumers Omnivore Consume Producers and Consumers

Filter Feeders Consume food particles that is suspended in the water; strain out the food

Consume dead organic matter Detritivores Consume dead organic matter

Organisms that attach themselves to another; consume “them” Parasites Organisms that attach themselves to another; consume “them”

Consume food that others have left behind Scavengers Consume food that others have left behind

Respiratory

Oxygen enters through small opening called spiracles Respiratory Tracheal Tubes: Tubes that allow the exchange of oxygen and carbon dioxide; Oxygen enters through small opening called spiracles Watch Video

Book Lung Each book lung consists of hollow flat plates. Air bathes the outer surface of the plates and blood circulates within them, allowing the exchange of gases.

Extract dissolved oxygen from the water or land Gills Extract dissolved oxygen from the water or land (Watch Video)

* Watch Video

Circulatory Open system

* Watch Video Have a developed heart; Insect blood, properly called hemolymph, flows freely through the body cavity and makes direct contact with organs and tissues.

Internal fertilization Reproduction Internal fertilization

Metamorphosis: “Change” Complete: Egg – larvae - Pupae – Adult (Watch Video)

Incomplete: Egg – Nymph - Nymph - Adult Metamorphosis Incomplete: Egg – Nymph - Nymph - Adult

Diversity: Crustacea

As you view the slides of Crustacea, write down some general characteristics

Daphnia

Rotifer

Lobster

Crab

Crab

Shrimp

Barnacle

Habitat Aquatic

Habitat Terrestrial

General Characteristics

Diversity: Chelicerates

As you view the slides of Chelicerates, write down some general characteristics

Spiders

Scorpion

Horseshoe Crab

General Characteristics

Diversity: Uniramia

As you view the slides of Uniramia, write down some general characteristics

Beetle

Praying Mantis

Butterflies

Honey Bee

Ants

Millipede

General Characteristics