What happens to our food after we swallow it? Chomp on some body science with this diagram of the digestive system.

Did you know that invertebrates don't have backbones? Find out some different types of invertebrates with the clues in this crossword puzzle.

This skeletal system worksheet, featuring a funny diagram of a human skeleton, is just the thing kids need to master their skeletal system vocabulary.

Learn more about the mysterious brain and how it works with this brain anatomy worksheet.

Learn more about the animals in the swamp food chain, and find out how each living thing in a swamp ecosystem needs another to survive.

This multi-page worksheet provides an opportunity for kids to practice both their understanding of food webs and their reading comprension skills.

There's a lot happening beneath the waves, including the ocean food web. Take a closer look with this colorful printable.

How does blood flow through the heart? This worksheet prompts kids to map how blood is pumped through this sophisticated organ.

Test your knowledge of prehistoric animals with this life sciences crossword puzzle!

Get to know your genes with Steve the savvy scientist! Genes help determine everything from your hair color to your height.

Ever wonder how the human body functions? Enjoy this great info sheet all about the human heart, one of our most important organs.

Need to know all about the lungs? Study up with this comprehensive lung anatomy worksheet.

Review the different body parts with a fun crossword! This is a great way for your little doctor-in-training to review the basic organs and their functions.

Students compare structures in the bodies of different organisms in order to draw conclusions about evolutionary relationships in this life science worksheet!

A useful overview of terrestrial biomes, including a climate key.

Studying human anatomy? Here is a great sheet that shows a diagram of all the muscle system. Your child will learn the scientific terms of the major muscles.

How cool are chromosomes? Read what Steve the savvy scientist has to say about chromosomes and genes before testing your knowledge with some fill-in-the-blanks.

Cut out and complete this trophic level pyramid template!

Learn more about the skin (and the science behind pimples -- ew!) in this printable life science diagram.

Explore how traits are influenced by both genetic and environmental factors with this life science worksheet!

Use your knowledge of sea creatures to fill out this crossword puzzle.

Budding biologists can learn all about human digestion with this information page, complete with a diagram of the digestive system.

Explore the difference between asexual and sexual reproduction in organisms with this middle school science worksheet!

Learn more about what lives--and what thrives--in marshes with this fill-in-the-blank worksheet on marsh ecosystems.

Children will learn important facts about food chains in these worksheets.

Discover how animal behaviors increase the probability of successful reproduction and offspring survival with this middle school science worksheet!

Color in this Awesome Anatomy page on the respiratory system and learn about how we breathe!