WorksheetsAnimal Internal & External structures
Total questions: 20
Worksheet time: 10mins
To understand how animals protect themselves, which structure would be most helpful to study?
Tongue
Shell
Lungs
Brain
Look at the picture.
Which external structure protects the animal in the picture?
Scales
Feathers
Skin
Exoskeleton
Which describes an external characteristic of an animal?
a fish’s shiny scales
a dog’s lungs
a frog’s heart
a turtle's skeleton
An animal uses its lungs to get oxygen from the air. Which other internal structure works in a similar way?
Ears
Brain
Gills
Heart
Which animal has an exoskeleton?
Cockroach
Deer
Horse
Fish
Which structure that best provides protection from a very wet environment.
fur
scales
feathers
claws
An organism ___________________ to create more of its own kind.
grows
survives
eats
reproduces
Sharp structures on the feet of some animals are called ______________________ .
Prey
Talons
Wings
Plants
Talons help animals catch ________________________. Beaks and teeth are other sharp external structures that help animals survive.
Prey
Talons
Wings
Plants
The lungs allow(s) mammals to breathe. Air containing _________ flows in
oxygen
carbon dioxide
The gas that flows out of an animal is __________.
oxygen
carbon dioxide
What fish structure is most similar to the human structure LUNGS?
Veins
Fins
Gills
Stomata
Look at the chart.
Which function best completes the chart?
helps animal breathe
protect animal from enemies
help animal find food
prevent animal from laying eggs
Which picture best shows what happens when an animal species
goes extinct?
A
B
C
D
Which picture best shows an alligator using an external structure to capture and eat prey?
A
B
C
D
Examine the information in the table.
What is the function that the organisms in the table have in common?
Their exoskeletons help them find food.
Their exoskeletons help them find mates.
Their exoskeletons help protect them.
Their exoskeletons help hide them.
A student is studying how animals that are not vertebrates protect their bodies. Look at the picture and complete the sentence.
The ____________________________ is a hard external covering.
skeleton
exoskeleton
lung
fur
A student is studying how animals that are not vertebrates protect their bodies. Look at the picture and complete the sentence in the student’s report.
An exoskeleton is a hard external covering that is _______________________.
freezing
furry
waterproof
gills
A student is studying how animals that are not vertebrates protect their bodies. Look at the picture and complete the sentence in the student’s report.
An exoskeleton helps the animal in the picture survive its watery environment by _____________________________ its internal structures.
protecting
freezing
furry
The diagram shows some of the internal structures of a shark.
Which of the following is most likely being shown with his diagram?
Sharks only use their mouths to breathe air.
Sharks have organs called lungs that help them to breathe.
Sharks have organs called gills to take in the oxygen from water.
Sharks only use their gills to take in the carbon dioxide from water.
