Biodiversity AC1 - Invertebrates Flashcards
Give 4 examples of Invertebrates
- Insects
- Arachnids
- Crustaceans
- Molluscs
What type of skeleton do insects have?
exoskeleton (a hard outer shell).
What are the three main body sections of an insect?
- head
- thorax
- abdomen
What special features do insects have on their heads?
Antennae
* for sensing
* compound eyes with many lenses
How many legs do insects have, and where are they attached?
- 6 legs
- attached to the thorax
What different ways can insects move?
- jump
- walk
- swim
- dig
- some fly
What does the abdomen contain?
- digestive and
- reproductive organs
How do insects grow inside their exoskeleton?
hey shed their old exoskeleton when they outgrow it
Do insects have lungs? How do they breathe?
- No lungs
- breath through vents on the side of their bodies
Give an example of a well-known insect.
Honey bees.
What type of skeleton do arachnids have?
hard exoskeleton.
How many legs do arachnids have?
8
What are the two main body parts of an arachnid?
- cephalothorax (fused head and thorax)
- abdomen
Do arachnids have antennae?
no
How do arachnids breathe?
- they have “book lungs”
- breath through spiracles
What allows arachnids to move?
They have jointed appendages for walking.
Give an example of a well-known arachnid.
Spider
What is the study of spider anatomy called?
Spider Anatomy focuses on the structure and function of a spider’s body.
Where do crustaceans spend most of their time?
in the water.
How many pairs of legs do crustaceans have?
five pairs of jointed legs.
What is special about the front pairs of legs in crustaceans?
- adapted for catching prey
- in form of pincers
How many body segments do crustaceans have?
- 2 segments
- cephalothorax
- abdomen
What do crustaceans use their antennae for?
form part of their sensory system.
What does the abdomen of a crustacean hold?
- heart
- digestive tract
- reproductive organs
