arthropods

Multiple Choice

The phylum arthropoda is the largest animal group on the planet.

• True

• False

Arthropods

The most varied and largest phylum of the animal Kingdom.

Multiple Select

Which of the following is an Arthropod?

• Shark

• Turtle

• Crab

• Snake

​Main Arthropods Classes

​There are over 20 classes of Arthropods!

​Insects

​

Crustaceans (including slaters, prawn, crabs, and lobsters)

​

​Myriapods (including centipedes and millipedes)

​

​Arachnids (including spiders, mites, and scorpions)

​

Multiple Select

The 4 main Arthropod classes we will learn about are......

• insects

• crustaceans

• myriapods

• trilobites

• arachnids

Multiple Select

Arthropods have an outer shell called a/ an ____________

• Endoskeleton

• Exoskeleton

• Bones

• Armor

​Amazing Arthropods

Invertebrates With

-They have Bilateral symmetry

-Jointed Body Parts

​-They have segmented bodies

-Pairs of Legs

-Their bodies are protected by an exoskeleton

​-They have articulated parts: Appendages

Multiple Choice

What type of symmetry do Arthropods have?

• Radial
• Bilateral
• Asymmetrical

​Their Bodies

​Arthropods have segmented bodies that can be one of three types:

​1.- Head, thorax and abdomen

2.- Cephalotorax and abdomen

3.- Head and trunk (trunk is both body and tail)

Multiple Choice

Which of the following correctly describes a crayfish's body regions?

• head, thorax, abdomen

• head, abdomen

• cephalothorax, abdomen

• head, cephalothorax

​Vital functions: Interaction

​Their nervous system and sense organs are more developed than in other invertebrate groups

​

They have two types of eyes: Simple and compound eyes

​Ocelli

​Ocelli (singular Ocellus) are simple photo-receptors (light detecting organs).

They consist of a single lens and several sensory cells. Unlike compound eyes, ocelli do not form a complex image of the environment but are used to detect movement

​Compound Eyes

​Compound eyes are made up of clusters of ommatidia, but simple eyes are made up of only one single unit of eye.

Multiple Choice

What contain thousands of lenses

• Abdomens

• Compound eyes

• Arthropods

​Respiratory system

​Aquatic arthropods breathe throug gills

​

Terrestrial arthropods breathe throug tracheae

Multiple Choice

Which of the following crayfish structures is used for gas exchange?

• Malpighian tubules

• Green glands

• Gills

• Book lungs

​Reproduction

​Reproduction is sexual

They are oviparus (eggs laid) and carry out a process called metamorphosis:

1. Incomplete metamorphosis: a nymph hatches from an egg and grows.

2. Complete metamorphosis: Larva, pupa and adult

Multiple Choice

Insects that undergo complete metamorphosis have young that are called...

• nymphs.

• larvae.

• intermediaries.

• sus.

​Insects

​3 Pairs of Legs (6 Legs)

3 Body Segments

Most Have Wings

Antennae

Multiple Choice

How many legs do insects have?

• 2

• 4

• 6

• 8

​Arachnids

​4 Pairs of Legs (8 Legs)

​2 Body Segments

​Feelers for Touching

​Do NOT Have Wings (THANK GOODNESS!!!)

Multiple Choice

How many legs do arachnids have?

• 2

• 4

• 6

• 8

​Crustaceans

​8 or More Legs​

Live Near or On Ocean Floor

Can Live on Land

Antennae

Crust (Exoskeleton), acean (Ocean)

Multiple Choice

If a crustacean loses an appendage, it will grow back

• True

• False

​Centipedes/Millipedes

​Many Legs (Usually Fewer Than 100)

Many Body Segments (Rolls Up for Protection)

Antennae

Lives Under Rocks or In Dark Places

Multiple Choice

How many legs do centipedes have per body segment?

• 2

• 4

• 100

• 1000

Multiple Choice

Millipedes are different from centipedes because millipedes ___.

• have more legs per segment

• secrete venom

• are predators

• hae flattened bodies

Multiple Choice

Arthropods can be predators

• True

• False