Ch 4 - Exploring the World of Invertebrates Flashcards
(39 cards)
What do we call animals without backbones?
Invertebrates
What are five ways invertebrates are alike?
They have no backbone
They usually have weak muscles
They are usually small animals with soft bodies
If they do have skeletons, the skeletons are on the outside of their bodies for strength and protection
They are cold-blooded
What might happen to an invertebrate if the temperature becomes too hot or too cold?
They might die
How does the temperature affect the way invertebrates move?
Invertebrates move slowly on cold days and quickly on warm days.
How do invertebrates feel things?
Invertebrates feel through little hairs on their legs or feet.
What do we call the special projections that help protect worms from hungry birds?
Setae
How many hearts does an earthworm have?
ten hearts
How many arms do octopuses have?
Eight
What are the arms of an octopus called?
Tentacles
What word means changing colour to match your surroundings?
camouflage
Starfish walk on special feet called…
tube feet
Why do fishermen dislike starfish?
They dislike starfish because they eat the clams and oysters the fishermen want to catch and sell.
What is the largest group of invertebrates called?
insects
Why can we hear mosquitoes when they are so tiny?
Their wings beat 300 times a second, which makes a high-pitched buzzing sound.
In what three ways are all insects alike?
They all have six legs
They all have three body parts
They all have an outer skeleton
What are the three parts of an insect’s body?
the head
the thorax
the abdomen
What does an insect’s head contain?
brain
antennae
eyes
mouth
What is the thorax?
The thorax is the insect’s “motor room.” It has wings for flying and legs for walking or swimming.
What does the abdomen contain?
The abdomen contains the insect’s heart and stomach.
What do we call the tiny holes along the side of an insect’s abdomen?
spiracles
What does an insect use its spiracles for?
Insects breath through their spiracles.
What colour is an insect’s blood?
Green or yellow, or sometimes colourless.
What are the four stages of an insect’s metamophosis?
egg
larva
pupa
adult
What are the insect’s main sense organs?
antennae
