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Structure & Function For Kids!

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A fun science lesson and video on structure and function for kids in 3rd, 4th & 5th grade!

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STRUCTURE OF LIVING THINGS DEFINITION

A structure is anything made up of parts held together. Plants and animals have many structures that help them survive. Some structures are internal, like the lungs, brain, or heart. Other structures are external, like skin, eyes, and claws. Some structures are unique, like the long neck of a giraffe. Other structures are more common, like a heart.

To better understand the structure and function of living things….

LET’S BREAK IT DOWN!

Animal Structure: All animals have structures that help them survive.

large lizard walking on concrete with tongue out

All animals have structures that help them survive in their environment. Some structures help animals find food, like the amazing eyesight of an eagle. Other animals have camouflage to help them hide from predators. Some structures are very unique to certain animals, like the water monitor lizard’s long, forked tongue. They use it to smell and find food.

One special structure that insects have is their hard outer skeleton, called an exoskeleton. Exoskeletons are like wearing armor. It protects insects from predators and keeps insects from drying out. Exoskeletons can also have special structures on them, like the horns on some beetles that are used to compete with other beetles for mates.

Plant Structure: Plants also have structures that help them survive.

closeup of spines on a preserved cactus

Plants have different parts, like roots, stems, leaves, flowers, and fruit. These structures help them survive.

Some plants have really long roots that help the plant gather water from deep below the surface of the Earth.

Other plants have flowers that are the perfect shape for insects to visit and help with pollination.

Plants that live in really dry areas, like a desert, have special leaves. The spines on a cactus help protect it from animals that might try to eat the cactus in order to get the water stored inside.

Animal and Plant Structures: Each structure has a specific function.

specimens from the scientific archives of plants

Each plant and animal structure has a special purpose. When you think of elephants, you probably envision their long trunks and floppy ears. Both of those structures have a specific function that helps elephants survive. An elephant’s trunk is a special structure that helps gather food. The big floppy ears help elephants hear noises that are far away.

Plant structures also have specific functions. Corn has special roots that help support the plant and keep it from falling over when fruit is growing on it.

Pine trees have leaves that look like needles instead of big and flat leaves like an oak tree. This helps them conserve water.

EXAMPLES OF THE STRUCTURES & FUNCTIONS OF LIVING THINGS

spider like critter on a leaf

Whip spiders capture prey with unique legs. The special claw-like grabbers are a specialized structure used for gathering food.

gecko feet through glass

Geckos have the ability to stick to almost any surface. Scientists were inspired by the gecko to create a super sticky tape that is really strong but doesn’t leave residue when it is taken off surfaces.

large tropical tree nut sitting on a beach

The “sea coconut” is the largest and heaviest seed in the world.  These extra large seeds hold nutrients for the growing plant, and they also float so they can travel far across the ocean.

ANIMAL AND PLANT STRUCTURES VOCABULARY

Structure
Anything made up of a number of parts held together in a particular way.
Internal Structures
Structures found on the inside of living things, such as the heart, lungs or brain.
External Structures
Structures found on the outside of living things like skin, eyes and claws.
Whip Spider
Also called a tailless whip scorpion, they are harmless to humans. They have eight legs but only six are used for walking. They are found in tropical regions worldwide and like to come out at night. They eat mostly insects and have many interesting internal and external structures discussed in the video.
Exoskeleton
A type of skeleton found on the outside of a living thing that covers its body for protection. Common examples include ants, beetles and crabs. While an exoskeleton provides protection, it also needs to be shed for an animal to grow larger.
Endoskeleton
“Endo” means internal or within so an endoskeleton is a skeleton that is on the inside of a living thing. Humans and all mammals have endoskeletons. Bugs and beetles for example have exoskeletons.
Botanist
A scientist that studies plants.
Biomimicry
Design of materials inspired by nature. The word “bio” means life and “mimic” means to copy something. For example, geckos have an amazing ability to climb due to structures in their feet so scientists have been inspired to invent really strong tape that uses similar structures.

ANIMAL AND PLANT STRUCTURES DISCUSSION QUESTIONS

What are some of the functions of Bob the Monitor Lizard’s claws?

Bob’s claws are used for digging, climbing and catching prey.

What structure gives the Monitor Lizard an enhanced sense of smell?

Bob the Monitor Lizard has a forked tongue, which enhances his sense of smell and helps him find prey. This is the same type of tongue a snake has. It is very sensitive to particles of matter in the air.

What are some of the structures and functions of the whip spider?

The whip spider has big arm-like jaws at the front of its body to help it catch prey. It also has a pair of very long thin legs covered in hairs that it uses to sense things in its environment.

What is an exoskeleton?

Exoskeletons are hard structures found on the outside of the body of some animals. Common examples include ants, beetles and crabs.

What is the function of the coloring on a butterfly wing?

Some butterfly wings are colored to look exactly like a leaf, which camouflages it and protects it from predators.

What are some functions of different plant seed structures?

Some seeds are large to provide lots of nutrients to the new plant that grows from it. Some seeds are tiny and light enough to be moved long distances by the wind. Some plants have seeds that float and can be carried long distances on ocean currents.

What is the function of the tiny pine needle leaves?

Tiny pine needle leaves stop water from escaping, allowing the pine tree to live in a dry place.

What structure does a cactus have that protects it from being eaten?

Cactus leaves have a spine structure which protects them from being eaten. The spines are actually modified leaves which have become very thin and hard. Ouch!

WATCH THE FULL STRUCTURES OF LIVING THINGS EPISODE!

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We Cover All Major Science Standards in Grades 3-5

Image play Four Seasons and Day Length
Image play Chemical vs. Physical Changes
Image play Variation of Traits
Image play Balanced & Unbalanced Forces
Image play Patterns in the Sky
Image play Introduction to Sound
Image play Weathering & Erosion
Image play What is Engineering?
Image play The Five Senses
Image play Introduction to Weather
Image play Structure of Living Things
Image play Water Cycle
Image play Oceans, Lakes and Rivers
Image play Properties of Matter
Image play Simple Machines
Image play Heating and Cooling
Image play Earth’s Orbit & Rotation
Image play Living vs. Non-Living Things
Image play Fossils & Extinction
Image play Inspired by Nature (Biomimicry)
Image play Energy Transfer
Image play Sun and Other Stars
Image play Introduction to Light
Image play Brain Processing of Senses
Image play Adaptations and the Environment
Image play Pollination and Seed Dispersal
Image play Collisions
Image play Magnets & Static Electricity
Image play Food Webs
Image play Material Properties and Purposes
Image play Conservation of Matter
Image play Gravity Pulls Things Down
Image play Ecosystems
Image play Patterns of Motion & Friction
Image play Pushes and Pulls
Image play Renewable vs. Nonrenewable Resources
Image play Human Body Systems
Image play Plant Growth Conditions
Image play Animal & Plant Life Cycles
Image play Natural Disasters
Image play Introduction to Traits
Image play Extreme Weather Solutions
Image play How Do We Use Food
Image play Solids, Liquids and Gases
Image play Wave Properties
Image play Moon & Its Phases
Image play Animals Help Their Babies Survive
Image play Plants Need Water And Light
Image play Interactions of Earth’s Spheres
Image play What Is Science?
Image play Sunlight Warms the Earth
Image play Light Reflection & Vision
Image play Communication Over Distances
Image play Habitats
Image play Parts of a Plant
Image play Particle Nature of Matter
Image play Weather vs. Climate
Image play Classification of Materials
Image play Animal Group Behavior
Image play Natural Resources
Image play Changing the Shape of Land
Image play What Is Science? (K-2)
Image play Reducing Our Impact on Earth
Image play Information Transfer
Image play External Animal Parts
Image play Earth’s Landscapes
Image play Living Things Change Their Environment
Image play Timescale of Earth’s Events
Image play Animals Need Food
Image play Biodiversity of Life on Earth
Image play Maps of Landforms
Image play Water Quality & Distribution
Image play Atoms & Molecules
Image play Plant & Animal Cells
Image play Tectonic Plates